For the mushroom filling
01 -
1 tablespoon unsalted butter
02 -
1 tablespoon olive oil
03 -
1 small shallot, finely minced
04 -
10 oz (285 g) cremini mushrooms, finely chopped
05 -
2 cloves garlic, minced
06 -
1 teaspoon fresh thyme leaves
07 -
1/2 teaspoon kosher salt
08 -
1/4 teaspoon black pepper
09 -
3 oz (85 g) cream cheese, softened
10 -
1/3 cup (30 g) finely grated parmesan cheese
For assembling
11 -
1 sheet frozen puff pastry, about 8.5 oz (245 g), thawed but cold
12 -
1 tablespoon all-purpose flour, for dusting
13 -
1 large egg, beaten with 1 teaspoon water
14 -
1 tablespoon chopped fresh parsley or thyme, for serving