Combine the sugar, apple cider vinegar, ketchup, soy sauce, brown sugar and garlic in a small bowl. Set aside for later.
In a separate small bowl combine 1 tbsp of water with the 1 tbsp of cornstarch. Set aside for later.
For The Meatballs
In a large skillet, heat 1 tbsp of olive oil over medium-high heat. Once hot, add in the onion, bell peppers and pineapple and cook about 3 minutes, until the peppers and onions have lightly charred.
Stir the sauce ingredients into the peppers and onions and bring to a simmer. Pour in the cornstarch mixture and cook until the sauce starts to thicken.
Add the prepared meatballs to the sauce and simmer until heated through. Serve over rice and enjoy!
Notes
*If using frozen meatballs, you can heat them up in the microwave prior to adding to the sauce, or simmer them frozen in the sauce until heated through. Just note that you'll need to reduce the heat so the sauce doesn't burn. **Make your own homemade meatballs quickly in the air fryer with my simple recipe!