Three Bean and Cornbread Casserole

Ingredients

• 2 cans (1-1/3 lb. each) baked beans
• 2 cans (15 oz. each) kidney beans, drained
• 1 can (8-1/2 oz.) lima beans
• 1 can (8 oz.) tomato sauce
• 1/4 cup catsup
• 2 tbsp. packed brown sugar
• 2 tbsp. minced onion
• 1/2 tsp. dry mustard
• 1/2 tsp. salt
• 1/4 tsp. pepper
• 2/3 cup flour
• 1/3 cup yellow cornmeal
• 1 tbsp. sugar
• 1 tsp. baking powder
• 1/2 tsp. salt
• 1 egg
• 1/2 cup milk
• 2 tbsp. margarine
• butter, softened