Shape uncooked ground beef, uncooked pepper and uncooked onion into balls. Bake at 350° for 15 minutes then turn and cook for another 15 minutes.
Combine all ingredients, except the cherries and pineapple, but including the cherry and pineapple juice. Cook on medium heat, stirring constantly until bubbly and starting to thicken. Add pineapple and cherries, cook 5 minutes more. Add meatballs to the sauce.