This savory cheese and onion tart is a comforting, golden-baked dish that combines caramelized onions with rich, melted cheese in a flaky crust. Perfect for lunch, dinner, or even a light brunch, it delivers a satisfying balance of sweetness from the onions and savory depth from the cheese. It’s a timeless recipe that feels both rustic and elegant.
Why You’ll Love This Recipe
This tart is simple yet full of flavor, making it ideal for both beginner and experienced cooks. The combination of slow-cooked onions and creamy cheese creates a rich filling that pairs beautifully with a crisp pastry base. It’s versatile enough to serve warm or cold, and you can easily adapt it with ingredients you already have at home. Whether you’re hosting guests or preparing a family meal, this dish always feels special without requiring complicated techniques.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
1 sheet shortcrust pastry (about 250 g)
3 large onions, thinly sliced
2 tablespoons olive oil
1 tablespoon butter
1 teaspoon sugar
1/2 teaspoon salt
1/2 teaspoon black pepper
3 large eggs
200 ml heavy cream
150 g grated cheese (such as cheddar or Gruyère)
1 tablespoon all-purpose flour
1/4 teaspoon ground nutmeg (optional)
Directions
Start by preheating your oven to 180°C (350°F). Roll out the shortcrust pastry and gently press it into a tart pan, making sure to cover the base and sides evenly. Trim any excess and prick the base with a fork. Chill the crust in the refrigerator for about 15 minutes to prevent shrinking.
Meanwhile, heat olive oil and butter in a large pan over medium heat. Add the sliced onions and cook slowly, stirring occasionally. Sprinkle in the sugar and salt to help the onions caramelize. Continue cooking for about 20–25 minutes until they become soft, golden, and slightly sweet. Remove from heat and let them cool slightly.
In a mixing bowl, whisk together the eggs, cream, black pepper, nutmeg, and flour until smooth. Stir in the grated cheese, then fold in the caramelized onions until everything is well combined.
Pour the filling into the prepared crust, spreading it evenly. Place the tart in the oven and bake for 30–35 minutes, or until the filling is set and the top is lightly golden.
Allow the tart to cool for at least 10 minutes before slicing. This helps the filling firm up and makes it easier to serve.
Servings and timing
This recipe yields 6 servings. Preparation time is approximately 20 minutes, with an additional 25 minutes for cooking the onions. Baking time is around 30–35 minutes, bringing the total time to about 1 hour and 20 minutes.
Variations
You can customize this tart in many ways to suit your taste. Add sautéed mushrooms or spinach for extra depth and nutrition. Substitute part of the cheese with feta for a tangy twist. For a richer flavor, include a handful of chopped herbs like thyme or parsley. You can also use a whole wheat crust for a more rustic and hearty version.
Storage/Reheating
Store leftover tart in an airtight container in the refrigerator for up to 3 days. To reheat, place slices in an oven at 160°C (320°F) for about 10–15 minutes until warmed through. Avoid microwaving if possible, as it can make the crust soft instead of crisp. This tart can also be enjoyed cold, making it convenient for quick meals.
FAQs
Can I make this tart ahead of time?
Yes, you can prepare it a day in advance and store it in the refrigerator. Reheat before serving or enjoy it cold.
What type of cheese works best?
Cheddar and Gruyère are excellent choices, but you can also use mozzarella or a mix of cheeses.
Can I freeze the tart?
Yes, once baked and cooled, wrap it well and freeze for up to 2 months. Thaw in the refrigerator before reheating.
Do I need to pre-bake the crust?
Chilling the crust helps prevent shrinking, but pre-baking is optional for this recipe.
Can I use store-bought pastry?
Absolutely, store-bought pastry saves time and works perfectly.
How do I prevent a soggy bottom?
Make sure the filling is not too wet and bake on the lower rack of the oven.
Can I make it without cream?
You can substitute cream with milk, though the filling will be less rich.
Is this recipe suitable for vegetarians?
Yes, it contains no meat and is fully vegetarian-friendly.
Can I add spices for more flavor?
Yes, spices like paprika or a pinch of chili flakes can enhance the taste.
What can I serve with this tart?
It pairs well with a fresh green salad or a light soup.
Conclusion
This savory cheese and onion tart is a reliable and delicious dish that fits any occasion. With its flaky crust, creamy filling, and rich onion flavor, it offers comfort and elegance in every bite. Easy to prepare and endlessly adaptable, it’s a recipe you’ll return to again and again.
A comforting savory tart with caramelized onions and melted cheese in a flaky shortcrust pastry, offering a rich, slightly sweet, and deeply satisfying flavor.
Total Time:1 hour 20 minutes
Yield:6 servings
Ingredients
1 sheet shortcrust pastry (about 250 g)
3 large onions, thinly sliced
2 tablespoons olive oil
1 tablespoon butter
1 teaspoon sugar
1/2 teaspoon salt
1/2 teaspoon black pepper
3 large eggs
200 ml heavy cream
150 g grated cheese (cheddar or Gruyère)
1 tablespoon all-purpose flour
1/4 teaspoon ground nutmeg (optional)
Instructions
Preheat oven to 180°C (350°F) and prepare a tart pan.
Roll out pastry, press into the pan, trim edges, and prick the base with a fork.
Chill the crust in the refrigerator for 15 minutes.
Heat olive oil and butter in a pan and cook sliced onions over medium heat.
Add sugar and salt, cooking for 20–25 minutes until caramelized.
Remove onions from heat and let cool slightly.
In a bowl, whisk eggs, cream, pepper, nutmeg, and flour until smooth.
Stir in grated cheese and fold in caramelized onions.
Pour filling into the prepared crust.
Bake for 30–35 minutes until set and golden.
Cool for at least 10 minutes before slicing and serving.
