INTRODUCTION
Savory Onion and Herb Tart with Creamy Cheese Filling: A Rustic Dish Full of Flavor is a warm, simple tart that honors slow-roasted onions and fresh herbs. The filling blends ricotta and crème fraîche for a soft, rich texture. A custard royale holds the tart together while slices of blue cheese add bright, tangy notes. This tart works well for family meals, brunch, or a light dinner.
If you like hands-off comfort food, also try the crockpot ravioli lasagna for another cozy meal idea.
This recipe reads as rustic and homey, yet you can make a healthy version by tweaking a few parts. With small changes, it can become a lighter option that fits a range of diets like meal prep and lower-carb plans. The base recipe has protein from dairy and eggs, and you can boost protein and fiber if you want a high protein meal or a diabetic-friendly dish.
WHY YOU WILL LOVE THIS RECIPE
- It has deep, sweet roasted onions and soft herbs that give big flavor with little effort.
- It is a great option for meal prep because you can roast the onions and make the dough ahead of time.
- It can be a lighter option with simple swaps to cut fat or carbs while keeping taste.
- It is a balanced meal when paired with a salad or beans — it delivers protein, fat, and carbs.
This tart feels rich but can be a good choice for weight loss if you portion it and use the lighter option ideas below. It also lends itself to a high protein meal if you increase the cheese or add lean protein on the side.
HOW TO MAKE Savory Onion and Herb Tart with Creamy Cheese Filling: A Rustic Dish Full of Flavor
This tart is built in steps: roast the onions, make the tart dough, prepare the cheese filling, make the custard (royale), assemble, and bake. The steps are clear and they fit into a weekend bake or a relaxed weeknight.
EQUIPMENT NEEDED
- Baking sheet (rimmed)
- Wire rack
- Food processor (for dough) or pastry cutter and bowl
- 10-inch tart pan (with removable bottom, if possible)
- Small bowls for fillings and custard
- Small saucepan
- Whisk and fork
- Rolling pin
- Oven
Ingredients You’ll Need :
For the Roasted Onions:
1 ½ pounds cipollini onions or pearl onions, peeled and quartered
¼ cup olive oil
¼ cup fresh rosemary leaves
1 tablespoon chopped fresh sage
1 tablespoon fresh thyme leaves
1 teaspoon kosher salt
For the Tart Dough:
2 cups all-purpose flour, plus extra for dusting
¼ teaspoon kosher salt
12 tablespoons cold unsalted butter, cut into ½-inch pieces
3 to 5 tablespoons ice water
For the Cheese Filling:
½ cup whole milk ricotta cheese, drained if needed
1 large egg yolk
1 tablespoon olive oil
¼ cup crème fraîche
Salt and black pepper to taste
For the Custard (Royale):
1 large egg
1 teaspoon all-purpose flour
Pinch of kosher salt
¼ cup heavy cream
¼ cup whole milk
1 tablespoon crème fraîche
Cheese Topping:
½ pound soft blue cheese (such as a domestic blue or Stilton-style), rind removed and sliced thin
STEP-BY-STEP INSTRUCTIONS :
-
Roast the Onions
Preheat your oven to 350°F. In a bowl, combine the onions, olive oil, rosemary, sage, thyme, and salt. Toss well to coat. Spread the mixture onto a rimmed baking sheet in an even layer. Roast for about 45 minutes or until the onions are soft and beginning to brown slightly but still hold their shape. Remove from oven and allow to cool on a wire rack. Increase oven temperature to 375°F. -
Make the Tart Dough
In a food processor, pulse the flour and salt to blend. Add the cold butter and pulse until the texture resembles coarse crumbs or small peas. While pulsing, add 3 tablespoons of ice water through the top. Pulse until the dough starts to clump. Add more water, 1 tablespoon at a time, if needed. Turn the dough onto a floured surface and form it into a flat disc. Roll out to a 13-inch circle and place it into a 10-inch tart pan, pressing gently into the edges. Trim any excess dough, prick the bottom with a fork, and chill for 30 minutes. -
Prepare the Cheese Filling
In a small bowl, whisk the ricotta, egg yolk, and olive oil until smooth. Stir in the crème fraîche and season lightly with salt and pepper. -
Make the Custard (Royale)
In another bowl, whisk the egg with the flour and a pinch of salt. In a small saucepan, heat the cream and milk just until hot, not boiling. Slowly whisk the warm milk mixture into the egg mixture to create a smooth custard. Stir in the crème fraîche. -
Assemble the Tart
Spread the cheese filling evenly over the chilled tart crust. Scatter about three-quarters of the roasted onions over the filling. Pour the custard evenly over the top. Arrange the cheese slices over the custard and dot with the remaining onions. -
Bake
Place the tart in the oven and bake for 30 minutes, rotating the pan halfway through. Loosely tent with foil and bake for another 15 minutes. If the crust or top needs additional browning, increase the heat to 400°F and bake uncovered for another 10 to 15 minutes. -
Cool and Serve
Let the tart rest in the pan on a wire rack for at least 5 minutes before slicing. Serve warm or at room temperature.
HOW TO SERVE Savory Onion and Herb Tart with Creamy Cheese Filling: A Rustic Dish Full of Flavor
- Serve the tart with a large green salad of mixed leaves, lemon juice, and a light vinaigrette. This adds fiber and keeps the meal balanced.
- Plate a 1/6 or 1/8 slice for controlled portions. A smaller slice can make this dish fit into a weight loss plan if paired with lean protein or extra veggies.
- For a high protein meal, add grilled chicken breast or a bowl of white beans on the side. The dish already has dairy protein from ricotta, egg, and blue cheese.
- The tart works warm or at room temperature, so it travels well for a picnic or potluck.
STORAGE & FREEZING : Savory Onion and Herb Tart with Creamy Cheese Filling: A Rustic Dish Full of Flavor
- Refrigerate: Cover the tart tightly with foil or plastic wrap and store in the fridge for up to 3 days. Serve cold or reheat gently in a 325°F oven for 10–15 minutes.
- Freeze: Wrap the whole tart or individual slices in plastic wrap and foil, then freeze for up to 2 months. To reheat, thaw in the fridge overnight and warm in a 350°F oven for about 15–20 minutes.
- Note: Custard and fresh herbs hold best when you avoid long freezer storage. For best texture, freeze before baking (par-bake crust), or freeze fully baked slices for easy meals.
SERVING SUGGESTIONS
- Balanced side: A simple arugula salad with lemon vinaigrette gives a bright, peppery contrast and adds fiber.
- Heartier side: A bowl of steamed green beans and lentils makes a full, balanced plate with added protein and fiber. For a cozy, low-effort meal, pair a slice with a warm bowl of crockpot white chicken chili for comfort and extra protein, which keeps the whole meal filling and heart healthy — try the crockpot white chicken chili for a warm side.
- Portion control tip: Aim for 1 slice (1/6 of the tart) with 1.5 to 2 cups of salad or vegetables for a balanced meal that supports weight loss or maintenance.
VARIATIONS
- Healthier version: Make a lighter option by using half the butter in the crust and swapping half the all-purpose flour for whole wheat pastry flour. Use low-fat ricotta and reduce the crème fraîche by half. This lowers calories and adds fiber for a diabetic-friendly or weight loss-friendly dish.
- High-protein or low-carb version: For a high protein meal or a low carb crust, use almond flour and a mixture of egg and butter to bind the crust. Add extra ricotta or some cottage cheese to the filling to raise protein. Serve with a side of roasted chickpeas or grilled chicken for a satisfying, high protein plate.
- Air fryer or oven-baked version: You can roast the onions in an air fryer at 325°F for 20–25 minutes in batches, shaking halfway through for even browning. The tart itself bakes best in a conventional oven, but small tartlets can be baked at 350°F for about 20–25 minutes, checking often. For an air fryer-friendly small tart, use a 6-inch removable pan and reduce baking time.
Another quick tip: if you like a one-pot comfort contrast on the side, pair the tart with slow-cooked dishes like crockpot white chicken chili for a warm and filling combo.
FAQs
Q: Is this tart good for people watching calories?
A: Yes. Use the lighter option in the variations to reduce butter and cream. Serve smaller slices with lots of salad to keep calories and portion size in control. This makes the tart a good choice for weight loss plans if you mind portions.
Q: Can I make this tart diabetic-friendly?
A: You can. Swap the regular crust for a whole grain or nut-based crust and cut back on heavy cream. Choose low-fat ricotta and more vegetables to raise fiber and lower net carbs.
Q: How long will leftovers keep?
A: Store baked tart in the fridge for up to 3 days. For longer storage, freeze slices for up to 2 months. Reheat gently in an oven to keep the crust crisp.
Q: Can I speed up the recipe for meal prep?
A: Yes. Roast a large batch of onions ahead of time and freeze in portions. Make the dough in advance and keep it chilled. Assembling is quick, which makes this a great dish for meal prep and planned dinners.
Q: Is this a high protein meal?
A: The base tart has moderate protein from ricotta, egg, and blue cheese. For a true high protein meal, add extra ricotta, a side of beans, or grilled chicken. Use the high-protein variation for more protein per bite.
Q: Can the onions be replaced with other vegetables?
A: Yes. Roasted leeks, caramelized shallots, or thinly sliced roasted mushrooms work well. Choose vegetables that roast down and keep a soft texture.
MAKE-AHEAD TIPS FOR Savory Onion and Herb Tart with Creamy Cheese Filling: A Rustic Dish Full of Flavor
- Roast the onions up to 3 days ahead and store in the fridge. This saves time on the day you bake. Roasted onions also freeze well in small boxes.
- Make the tart dough a day ahead and keep it tightly wrapped in the fridge. Let it rest for 10 minutes before rolling. This helps the butter stay firm for a flakier crust.
- Mix the cheese filling and custard the morning of your bake and keep them chilled until you assemble. This makes the final assembly quick and easy.
- For meal prep, bake the tart, slice it into portions, and store slices in the fridge for easy lunches or dinners. Reheat in a low oven or enjoy at room temperature for a fast, balanced meal.
Savory Onion and Herb Tart with Creamy Cheese Filling
Ingredients
Method
- Preheat your oven to 350°F. In a bowl, combine the onions, olive oil, rosemary, sage, thyme, and salt. Toss well to coat. Spread the mixture onto a rimmed baking sheet in an even layer. Roast for about 45 minutes or until the onions are soft and beginning to brown slightly but still hold their shape. Remove from oven and allow to cool on a wire rack. Increase oven temperature to 375°F.
- In a food processor, pulse the flour and salt to blend. Add the cold butter and pulse until the texture resembles coarse crumbs or small peas. While pulsing, add 3 tablespoons of ice water through the top. Pulse until the dough starts to clump. Add more water, 1 tablespoon at a time, if needed. Turn the dough onto a floured surface and form it into a flat disc. Roll out to a 13-inch circle and place it into a 10-inch tart pan, pressing gently into the edges. Trim any excess dough, prick the bottom with a fork, and chill for 30 minutes.
- In a small bowl, whisk the ricotta, egg yolk, and olive oil until smooth. Stir in the crème fraîche and season lightly with salt and pepper.
- In another bowl, whisk the egg with the flour and a pinch of salt. In a small saucepan, heat the cream and milk just until hot, not boiling. Slowly whisk the warm milk mixture into the egg mixture to create a smooth custard. Stir in the crème fraîche.
- Spread the cheese filling evenly over the chilled tart crust. Scatter about three-quarters of the roasted onions over the filling. Pour the custard evenly over the top. Arrange the cheese slices over the custard and dot with the remaining onions.
- Place the tart in the oven and bake for 30 minutes, rotating the pan halfway through. Loosely tent with foil and bake for another 15 minutes. If the crust or top needs additional browning, increase the heat to 400°F and bake uncovered for another 10 to 15 minutes.
- Let the tart rest in the pan on a wire rack for at least 5 minutes before slicing. Serve warm or at room temperature.