→ Filling
01 -
2 tablespoons unsalted butter
02 -
1 small yellow onion, finely chopped
03 -
2 garlic cloves, minced
04 -
1 pound mixed mushrooms (such as cremini, shiitake, oyster), chopped
05 -
1 tablespoon fresh thyme leaves
06 -
1 tablespoon all-purpose flour
07 -
Salt, to taste
08 -
Freshly ground black pepper, to taste
→ Crust and Finish
09 -
1 sheet puff pastry, thawed
10 -
1 large egg, beaten
→ Additional
11 -
1/2 cup vegetable broth
12 -
1/4 cup heavy cream
13 -
2 teaspoons Dijon mustard
14 -
3/4 cup Gruyère cheese, grated