→ Filling
01 -
2 tablespoons unsalted butter
02 -
1 tablespoon olive oil
03 -
1 large leek, white and light green parts only, thinly sliced
04 -
250 grams cremini mushrooms, finely chopped
05 -
1 garlic clove, minced
06 -
1 tablespoon fresh thyme leaves or 1 teaspoon dried thyme
07 -
2 tablespoons all-purpose flour
08 -
120 millilitres vegetable broth
09 -
120 millilitres heavy cream
10 -
100 grams Gruyère cheese, shredded
11 -
Salt, to taste
12 -
Freshly ground black pepper, to taste
→ Pastry
13 -
1 sheet puff pastry, thawed if frozen
14 -
1 egg, beaten