This savory onion tart features a flaky crust filled with caramelized onions and creamy cheese, making it a delightful dish for any occasion. It’s perfect as an appetizer, side dish, or even a light main course.
The recipe is simple and requires basic cooking techniques. You can customize it with herbs or additional ingredients like bacon or cheese to enhance the flavor.
Creating the Perfect Onion Tart
The onion tart is a delightful dish that brings together the sweetness of caramelized onions and the richness of cheese.
With a flaky crust and a creamy filling, it serves as a wonderful appetizer or a light main course.
This dish is not only satisfying but also visually appealing, making it a great choice for gatherings or family meals.
Ingredients That Shine
To make this savory tart, you’ll need a few key ingredients.
The foundation is a buttery pie crust, which can be homemade or store-bought for convenience.
The star of the show is the onions, which should be thinly sliced and cooked until they reach a golden-brown perfection.
Adding fresh herbs like thyme or rosemary can elevate the flavor profile, while the creamy filling made with eggs and heavy cream binds everything together beautifully.
Cooking Techniques to Master
Caramelizing onions is an essential technique for this recipe.
Start by heating olive oil and butter in a skillet, then add the sliced onions along with salt and pepper.
Patience is key here; cook them over medium heat for about 20-25 minutes, stirring occasionally, until they become soft and golden.
This step enhances the natural sweetness of the onions, creating a rich flavor that permeates the tart.
Assembling Your Tart
Once the onions are caramelized, it’s time to assemble the tart.
If you’re using a pre-made crust, follow the package instructions for any necessary pre-baking.
In a bowl, whisk together the eggs, heavy cream, and optional Dijon mustard for a hint of tanginess.
Fold in the caramelized onions and grated cheese, then pour this mixture into the prepared crust, spreading it evenly.
Baking to Perfection
Baking the tart is where the magic happens.
Place it in a preheated oven set to 375°F (190°C) and let it bake for 30-35 minutes.
You’ll know it’s ready when the filling is set and the top is a beautiful golden brown.
Allow the tart to cool slightly before slicing, which helps maintain its structure and makes for easier serving.
Serving Suggestions
This onion tart can be enjoyed warm or at room temperature, making it versatile for any occasion.
Garnish with fresh herbs for a pop of color and added flavor.
Pair it with a simple salad or serve it as part of a larger spread at your next gathering.
Its rich taste and inviting aroma will surely impress your guests and leave them wanting more.
Delicious Caramelized Onion Tart Recipe
This onion tart combines sweet, caramelized onions with a rich custard filling, all encased in a buttery pastry crust. The dish takes about 1 hour from start to finish and serves 6 people.
Ingredients
- 1 pre-made pie crust or tart shell
- 4 large onions, thinly sliced
- 2 tablespoons olive oil
- 2 tablespoons butter
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 teaspoon fresh thyme or rosemary, chopped (optional)
- 3 large eggs
- 1 cup heavy cream
- 1 cup grated Gruyère or Swiss cheese
- 1 tablespoon Dijon mustard (optional)
Instructions
- Preheat the Oven: Preheat your oven to 375°F (190°C).
- Cook the Onions: In a large skillet, heat the olive oil and butter over medium heat. Add the sliced onions, salt, and pepper. Cook, stirring occasionally, for about 20-25 minutes until the onions are caramelized and golden brown. Add herbs if using.
- Prepare the Crust: Place the pie crust in a tart pan or pie dish. If using a pre-made crust, follow package instructions for pre-baking if necessary.
- Mix the Filling: In a bowl, whisk together the eggs, heavy cream, and Dijon mustard (if using). Stir in the grated cheese and the caramelized onions.
- Assemble the Tart: Pour the onion and cheese mixture into the prepared crust, spreading it evenly.
- Bake: Bake in the preheated oven for 30-35 minutes, or until the filling is set and the top is golden brown.
- Cool and Serve: Allow the tart to cool for a few minutes before slicing. Serve warm or at room temperature.
Cook and Prep Times
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Servings: 6 slices
- Calories: 320kcal
- Fat: 24g
- Protein: 8g
- Carbohydrates: 22g