I looked but couldn't find the recipe. It's similar to this one: Mushroom Turnovers
They're made smaller than this recipe--3" around. She makes a large batch (maybe even doubles the recipe) and keeps a bag of frozen turnovers on hand all the time.
Ingredients
FOR THE RELLENO (filling)
1/2 stick unsalted butter
1 pound fresh, firm white mushrooms, wiped clean
with a damp cloth or paper towel and finely chopped
1/4 cup chopped scallions (white part and 1 inch of
the green)
1/4 cup whipping cream
1/2 teaspoon salt
1/4 teaspoon freshly ground black pepper
Pinch of freshly grated nutmeg
2 tablespoons day-old bread crumbs
2 tablespoons finely chopped fresh parsley leaves or
dill
8 ounces cheddar cheese, shredded (My friend's mom uses a white cheese. Emmenthal?)
FOR THE DOUGH
2 packages Pepperidge Farm frozen puff pastry shells,
thawed
1 large egg lightly beaten with 1 tablespoon water