Description
A delicious Caramelized Onion Cheese Tart featuring slowly caramelized sweet onions, rich melted Gruyere or sharp cheddar cheese, and a flaky, buttery puff pastry crust. Perfect for brunch, casual dinners, or as a savory snack with versatile serving options and easy preparation.
Ingredients
Scale
Vegetables & Herbs
- 2 large yellow or sweet onions, thinly sliced
- 1 teaspoon fresh thyme leaves
Fats & Oils
- 2 tablespoons unsalted butter
- 1 tablespoon olive oil
- 1 egg (for egg wash)
Dairy
- 1 1/2 cups shredded Gruyere or sharp white cheddar cheese
Others
- 1 sheet store-bought puff pastry, thawed
- Salt, to taste
- Freshly ground black pepper, to taste
Instructions
- Prepare the Onions: Thinly slice the onions. Heat butter and olive oil in a wide pan over medium-low heat. Add the onions and cook slowly for 30-40 minutes, stirring frequently until golden brown, sweet, and fully softened.
- Prepare the Puff Pastry: Roll out puff pastry on a lightly floured surface to fit your tart pan or baking sheet. Prick the base lightly with a fork to prevent excessive puffing. Brush the edges with beaten egg wash for a golden crust later.
- Assemble the Tart: Spread the caramelized onions evenly over the pastry, leaving a small border around edges. Sprinkle shredded cheese generously over the onions. Scatter fresh thyme leaves on top for aroma and subtle earthiness.
- Bake Until Golden: Place tart in a preheated oven at 400°F (200°C). Bake for 20-25 minutes, until puff pastry is puffy and golden, and cheese is melted and bubbly.
- Cool and Serve: Remove from oven and let the tart rest for 5 minutes before slicing to allow cheese to set and flavors to meld.
Notes
- Cook onions on low heat for best caramelization without burning.
- Use fresh, flavorful cheese to avoid a bland tart.
- Keep puff pastry chilled until ready to bake to ensure maximum flakiness.
- Make sure onions are fully caramelized to develop sweetness.
- Brushing the pastry edges with egg wash enhances a glossy, appetizing golden finish.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Category: Appetizers
- Method: Baking
- Cuisine: French-inspired
Nutrition
- Serving Size: 1 slice (1/8 of tart)
- Calories: 320
- Sugar: 6g
- Sodium: 350mg
- Fat: 22g
- Saturated Fat: 10g
- Unsaturated Fat: 8g
- Trans Fat: 0g
- Carbohydrates: 20g
- Fiber: 2g
- Protein: 8g
- Cholesterol: 65mg