This savory tart features sweet caramelized onions paired with rich Gruyère cheese, all encased in a flaky pastry crust. It’s an elegant dish perfect for appetizers, brunch, or a light dinner.
The recipe is simple to follow and highlights the natural sweetness of the onions, making it a delightful addition to any meal.
Delicious Caramelized Onion and Gruyère Tart
This tart combines layers of caramelized onions and melted Gruyère cheese on a buttery pastry base. It takes about 1 hour to prepare and bake, serving 6 people.
Ingredients
- 1 sheet of puff pastry, thawed
- 3 large onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 1 teaspoon sugar
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1 cup grated Gruyère cheese
- 2 large eggs
- 1/2 cup heavy cream
- Fresh thyme leaves for garnish (optional)
Instructions
- Preheat the Oven: Preheat your oven to 400°F (200°C).
- Cook the Onions: In a large skillet, heat olive oil and butter over medium heat. Add the sliced onions, sugar, salt, and pepper. Cook, stirring occasionally, until the onions are caramelized and golden brown, about 25-30 minutes.
- Prepare the Pastry: Roll out the puff pastry on a lightly floured surface and fit it into a tart pan. Trim any excess pastry and prick the bottom with a fork.
- Assemble the Tart: Spread the caramelized onions evenly over the pastry. Sprinkle the grated Gruyère cheese on top.
- Mix the Custard: In a bowl, whisk together the eggs and heavy cream. Pour the mixture over the onions and cheese in the tart.
- Bake: Bake in the preheated oven for 25-30 minutes, or until the tart is golden and the custard is set.
- Serve: Allow the tart to cool slightly before slicing. Garnish with fresh thyme leaves if desired, and serve warm or at room temperature.
Cook and Prep Times
- Prep Time: 20 minutes
- Cook Time: 40 minutes
- Total Time: 1 hour
Nutrition Information
- Servings: 6 slices
- Calories: 320kcal
- Fat: 22g
- Protein: 8g
- Carbohydrates: 24g
This recipe is part of my 35 Best Thanksgiving Appetizers for Your Best Turkey Day. Just click that link to see all the amazing options!
Jeff was a leader for Whole Foods Market for over 2 decades and is now a recovering foodie. When he's not spending time in the kitchen, he can usually be found with 3 daughters, practicing martial arts, making music, or blogging on his other sites. Click Here to learn more about me. Click Here to learn more about my site. Editorial Policies.
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