2 sticks plus 5 tablespoons frozen, unsalted butter
¼ teaspoon salt
1 ¼ cups all-purpose flour
6 tablespoons ice water
4 oz cooked chicken, flaked and finely chopped
4 oz sliced mushrooms
2 sheets puff pastry
½ oz butter
½ pint white sauce
12 cranberries
Salt
Freshly ground black pepper
Parsley and chives to garnish