Broccoli Quiche

1 (9 inch) unbaked deep dish pastry shell
1 1/2 cups chopped onion
1 1/2 cup chopped cooked broccoli
1/2 cup sliced fresh mushrooms
1/2 teaspoon salt
1/4 teaspoon pepper
3 eggs
1/4 cup milk
1 1/2cup shredded Swiss cheese

Line unpricked pastry shell with a double thickness of heavy-duty foil. Bake at 450 degrees for 5 minutes. Remove foil; bake 5 minutes longer. Reduce heat to 350 degrees. Stir together onion, broccoli and mushrooms. Layer in pie shell, alternating with cheese. End with cheese.

In a bowl, beat eggs. Add the milk, salt and pepper and mix well. Carefully pour over vegetables. Bake for 40-45 minutes or until a knife inserted near the center comes out clean. Let stand for 5 minutes before cutting.