Preheat oven to 350F. In a large bowl, combine condensed soup, turkey, vegetables, onion, milk and seasonings.
3 cups turkey, 2 cans cream of potato soup, 2 cups peas and carrots, ½ - 1 small onion chopped, ¼ cup milk, 1 teaspoon Herbes de Provence, ½ teaspoon pepper
Spray a 9-inch deep dish pie plate with cooking spray, then add the turkey mixture and spread evenly. Bake for 25 minutes at 350F.
Cooking spray
Unroll the puff pastry sheet and cut into one-inch strips with a pizza cutter or knife. On a piece of wax paper, weave the strips to form a lattice pattern. Once formed, the lattice crust can be refrigerated until ready to use.
1 sheet puff pastry
After 25 minutes, remove the pie plate from the oven and turn the temperature up to 400F.
Carefully transfer the lattice crust onto the top of the hot mixture. Adjust the strips as needed.
Brush the top of the pastry with beaten egg.
1 egg
Return the pie plate to the oven and bake at 400F for 20-25 minutes, until the filling is hot and the puff pastry is golden brown.