Mushroom Quiche

1 frozen pie shell
6 slices American cheese

1 lg onion, chopped
1 lg can mushrooms

⅓ cup milk
⅓ cup flour
½ tsp baking powder
2 eggs

Sauté the onion and mushrooms. Layer ½ of the mushroom mixture and 3 slices of cheese in the pie shell. Repeat with rest of the mushrooms and cheese. Mix the other ingredients and pour on top of mushrooms. Bake at 350o for ½ an hour.