Description
An elegant and savory puff pastry parcel filled with rich caramelized onions, earthy mushrooms, and melted Gruyère cheese.
Ingredients
Scale
For the Crust:
- 1 sheet puff pastry, thawed
- 2 large onions, thinly sliced
- 2 tbsp butter
- 1 tbsp olive oil
- 8 oz cremini mushrooms, sliced
- 2 cloves garlic, minced
- 1 tsp fresh thyme leaves
- 1 cup shredded Gruyère cheese
- 1 egg, beaten (for egg wash)
- Salt and pepper to taste
Instructions
1. Prepare the Crust:
- Heat butter and olive oil in a pan over medium heat. Add onions and cook slowly, stirring occasionally, until deeply golden and caramelized, about 20-25 minutes. Season with salt and set aside.
- In the same pan, add mushrooms and cook until browned and tender, about 8-10 minutes. Add garlic and thyme, cook for 1 more minute. Season with salt and pepper, then combine with caramelized onions.
- Roll out puff pastry on a floured surface. Spread onion-mushroom mixture over the center, leaving a border. Top with shredded Gruyère.
- Fold the pastry over the filling, sealing edges with egg wash. Brush the top with remaining egg wash and score lightly with a knife.
- Bake at 400°F (200°C) for 20-25 minutes, until golden brown and puffed. Let rest 5 minutes before slicing.
Notes
You can customize the seasonings to taste.