Ingredients
Scale
- 1 sheet of puff pastry, thawed
- 1 yellow onion, thinly sliced
- 3 tablespoons honey or homemade hot honey, divided
- Fresh thyme leaves, salt, and black pepper, to taste
- 18 pieces thinly sliced gruyere cheese, or as needed
- 1 egg, beaten
Instructions
- Get Prepared: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
- Set the Sections: Drizzle small amounts of hot honey onto the parchment-lined baking sheet, creating 9 separate honey drizzles. Cut the thawed puff pastry into 9 equal rectangles.
- Assemble the Tarts: Sprinkle fresh thyme leaves, salt, and pepper over each honey drizzle. Press a slice of onion on top of each honey drizzle, followed by 1-2 thin slices of gruyere cheese. Place a puff pastry rectangle on top of each onion and cheese stack.
- Brush and Bake: Brush the top of each puff pastry tart with beaten egg wash. Transfer the baking sheet to the preheated oven and bake for approximately 20 minutes, or until the tarts are nicely browned and puffed up.
- Finish and Serve: Once baked, remove the tarts from the oven and carefully flip each one over using a spatula. Drizzle additional hot honey over each tart and sprinkle with fresh thyme leaves. Allow the tarts to cool slightly before serving. They are best enjoyed warm.