Hawaiian Baked Beans
["4 (48 oz. each) jars Great Northern beans, rinsed and drained", "4 c. chopped onion", "1 (2 lb.) bag dark brown sugar", "2 lb. cubed, fully cooked ham", "1 (28 oz.) bottle ketchup", "1 (20 oz.) can crushed pineapple, drained", "1/2 c. prepared mustard", "1/3 c. vinegar"]
["Combine all ingredients; mix well.", "Divide among 4 greased 13 x 9 x 2-inch baking pans.", "Cover tightly.", "Bake at 350\u00b0 for 1 1/2 hours.", "Uncover and bake for 20 to 30 minutes more.", "Yields 80 to 100 servings."]
["jars Great Northern beans", "onion", "brown sugar", "ham", "ketchup", "pineapple", "prepared mustard", "vinegar"]