Crustless Quiche
["1 c. flour", "1 tsp. salt", "1 tsp. baking powder", "6 Tbsp. melted margarine", "1/2 medium chopped onion", "4 eggs", "1 c. milk", "1 (10 oz.) pkg. spinach, thawed and drained", "1 lb. grated Cheddar cheese"]
["Mix well the flour, salt and baking powder.", "Add the remaining ingredients.", "Mix very well by hand.", "Pour into a greased 9 x 13-inch pan.", "Bake at 350\u00b0 for 30 minutes."]
["flour", "salt", "baking powder", "margarine", "onion", "eggs", "milk", "spinach", "Cheddar cheese"]