Baked Beans(For 75 People)  
["3 gal. cans pork and beans", "2 Tbsp. dry mustard", "15 oz. ketchup", "1/2 lb. brown sugar", "onion, peeled and diced (optional)*"]
["Pour all ingredients into a large container or electric oven and mix well.", "Heat at 375\u00b0 until bubbly on sides.", "Then reduce heat to 250\u00b0 and cook 1 1/2 hours more.", "Stir frequently."]
["pork", "mustard", "ketchup", "brown sugar", "onion"]