Spinach Squares - cooking recipe

Ingredients

1 tsp. baking powder
4 Tbsp. margarine, melted
3 eggs
1 1/2 c. flour
1 c. milk
1 tsp. salt
1 lb. shredded Cheddar cheese
2 boxes frozen chopped spinach, thawed, but not drained
1 small chopped onion

Preparation

Stir ingredients together.
Pour into 9 x 13-inch baking pan; sprinkle with salt and pepper.
Bake at 350\u00b0 for approximately 45 minutes or until light or medium brown.
Let cool slightly and cut into small squares.