1 20-ounce can pineapple chunks (drained, 1/2 cup of juice reserved)
1/2 green bell pepper (cut into 1-inch pieces)
1/2 large red bell pepper (cut into 1-inch pieces)
2/3 cup brown sugar
1/3 cup apple cider vinegar
2 tablespoons soy sauce
3 tablespoons cornstarch
Instructions
Put the frozen meatballs in the slow cooker with the pineapple chunks, bell pepper pieces, brown sugar, vinegar, and soy sauce. Whisk the cornstarch into the reserved pineapple juice.
Cover the slow cooker and cook on low for 4 hours. Turn to high and cook for 30 minutes longer to thicken the sauce.