2 1/2 lbs. ground ham
2 lbs. ground pork
1 lb. ground beef
3 c. graham cracker crumbs
2 (10 oz.) cans tomato soup
1 3/4 c. vinegar
3 eggs
2 c. milk
2 tsp. dry mustard

Mix meat, egg, milk and graham cracker crumbs into balls. Mix remaining ingredients into a sauce. Pour over ham balls, cover and bake at 350 degrees for 1 hour, basting occasionally.