01 -
Add the frozen meatballs to the slow cooker.
02 -
Remove ribs and seeds from the bell peppers, chop them into chunks, and add to the slow cooker. Peel the onion, cut into chunks, and add to the slow cooker.
03 -
Drain the juice from the pineapple can and set the juice aside. Add the pineapple chunks to the slow cooker.
04 -
Whisk together the reserved pineapple juice, brown sugar, rice vinegar, ketchup, and soy sauce. Mix the cornstarch with 2 tablespoons of water to create a smooth slurry. Whisk the slurry into the pineapple juice mixture.
05 -
Pour the sauce mixture over the meatballs in the slow cooker. Cover and cook on high for 2-3 hours or on low for 4-6 hours until fully heated through and the sauce has thickened.