Spinach Squares
["4 tsp. butter", "3 eggs", "1 c. flour", "1 c. milk", "2 pkg. frozen chopped spinach (10 oz.), cooked to directions", "1 medium yellow onion", "1 tsp. salt", "pinch of pepper", "1 tsp. baking powder", "1 lb. grated Cheddar cheese"]
["Preheat oven to 350\u00b0.", "In 13 x 9-inch pan, melt butter in pan in oven and remove.", "In large bowl, mix eggs (beaten), flour, milk, baking powder, salt and pepper.", "Mix well.", "Add cheese, spinach and onion.", "Pour into buttered pan.", "Bake for 35 minutes. Cool for 45 minutes before serving.", "If made ahead of time, they may be reheated at 325\u00b0 for 10 minutes."]
["butter", "eggs", "flour", "milk", "spinach", "yellow onion", "salt", "pepper", "baking powder", "Cheddar cheese"]