20-ouncepineapple chunks(Canned pineapple reserved the juice)
1smallred bell pepper(cut into 1-inch chunks)
1smallgreen bell pepper(cut into 1-inch chunks)
1smallonion(cut into 1-inch chunks)
½cupbrown sugar
¼cupgranulated sugar
⅓cupapple cider vinegar
¼cupketchup
2tablespoonssoy sauce
2tablespoonscornstarch
Sliced green onions(for garnish)
Instructions
In a large measuring cup or bowl, whisk together the reserved pineapple juice, apple cider vinegar, brown sugar, granulated sugar, ketchup, soy sauce, and cornstarch until smooth. Set aside.
Add the frozen meatballs to the slow cooker, spreading them out in an even layer.
Scatter the pineapple chunks, red bell pepper, green bell pepper, and onion evenly over the meatballs.
Pour the prepared sauce over everything in the crockpot, making sure the meatballs and vegetables are well coated.
Cover and cook on LOW for 3 to 5 hours, stirring once halfway through, until the meatballs are heated through and the sauce has thickened.
Garnish with sliced green onions just before serving. Serve warm as an appetizer or spooned over white rice for a full meal.
Notes
The sauce typically starts thickening around the 4-hour mark. If the meatballs are fully heated and you want a thicker sauce sooner, remove the lid and switch to HIGH for 15 to 20 minutes, stirring occasionally to prevent sticking.
If you are planning to use these as appetizers, you can skip the pineapple, bell peppers, and onions. Replace the pineapple juice with ½ cup pineapple juice and ½ cup water to maintain the correct liquid amount.
Plain frozen meatballs work best, such as homestyle, Angus beef, turkey, or chicken. Avoid heavily seasoned varieties like Italian-style meatballs, which can overpower the sauce.
Homemade meatballs, fresh or frozen, also work well. If using fresh meatballs, cook on LOW for 4 to 6 hours and check that the internal temperature reaches 160–165°F.