In saucepan, stir cornstarch and brown sugar. Gradually stir, add pineapple juice, vinegar and soy sauce until smooth. Bring to a boil. Add green pepper, onion and pineapple chunks. Cook 1 min. Add meatballs. Stir carefully, not to break up the meatballs. Serve with rice or as appetizers. Two recipe's will fill a medium size crock pot. Make recipe(s) ahead, refrigerate and later, heat in a crock pot on low for 2-3 hours. Makes delicious appetizers for a crowd. Ground Venison may be used in place of hamburger in this recipe.