In a 9x9 baking dish, combine the pork and beans, brown sugar, onion, ketchup, mustard, Worcestershire sauce and vinegar. Season with salt and pepper and mix together.
30 ounces cans pork and beans, ½ cup brown sugar, ½ onion, ½ cup ketchup, 1 Tablespoon prepared mustard, 1 teaspoon Worcestershire sauce, 1 teaspoon red wine vinegar, Salt and pepper to taste