Description
These Upside-Down Onion and Gruyere Tarts are a delightful combination of sweet caramelized onions, rich Gruyere cheese, and fragrant fresh thyme all baked to perfection on a flaky puff pastry base. Drizzled with honey and finished upside-down for a stunning presentation, these tarts offer a perfect balance of savory and sweet flavors ideal for appetizers or a light meal.
Ingredients
Scale
Main Ingredients
- 1 sheet of puff pastry, thawed
- 1 yellow onion, thinly sliced
- 3 tablespoons honey or homemade hot honey, divided
- Fresh thyme leaves, to taste
- Salt, to taste
- Black pepper, to taste
- 18 pieces thinly sliced Gruyere cheese (or as needed)
- 1 egg, beaten
Instructions
- Preheat Oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper to prepare for baking.
- Prepare Honey Drizzles: Drizzle small amounts of hot honey onto the parchment paper, creating nine separate spots of honey where each tart will be assembled.
- Cut Puff Pastry: Cut the thawed puff pastry sheet into nine equal rectangles to serve as the tart tops.
- Assemble Tarts: On each spot of honey drizzle, sprinkle fresh thyme leaves, salt, and black pepper. Press a thin slice of onion onto the honey, followed by one or two thin slices of Gruyere cheese. Place a puff pastry rectangle on top of each onion and cheese stack.
- Egg Wash: Brush the top of each puff pastry tart evenly with beaten egg to promote a golden, glossy finish during baking.
- Bake: Transfer the baking sheet to the preheated oven and bake for approximately 20 minutes or until the tarts are golden brown and puffed.
- Flip and Finish: Carefully remove the tarts from the oven and use a spatula to flip each tart upside down so the onion and cheese layers are on top.
- Final Touch: Drizzle additional hot honey over the flipped tarts and sprinkle with fresh thyme leaves for added flavor and aroma. Allow to cool slightly before serving. Enjoy warm.
Notes
- Homemade hot honey can be substituted or omitted for a milder flavor.
- Ensure puff pastry is fully thawed for easy handling and proper puffing during baking.
- The flipping step is crucial to reveal the caramelized onion and cheese topping attractively.
- Serve warm for the best texture and flavor experience.
- For a vegetarian option, be sure the honey source aligns with your dietary preferences.
Nutrition
- Serving Size: 1 tart
- Calories: 180 kcal
- Sugar: 4 g
- Sodium: 180 mg
- Fat: 12 g
- Saturated Fat: 6 g
- Unsaturated Fat: 5 g
- Trans Fat: 0 g
- Carbohydrates: 14 g
- Fiber: 1 g
- Protein: 6 g
- Cholesterol: 40 mg
