Spray inside of slow cooker with non-stick cooking spray.
Place all ingredients inside the slow cooker and stir gently.
Place lid on slow cooker. Cook on low for 2-3 hours or on high for 1-3 hours. (or until meatballs are warmed through)
Serve over rice as a main dish or serve with toothpicks for a yummy appetizer.
To Make in Instant Pot
Place meatballs in the bottom of the Instant Pot. Top with the peppers, onions and undrained pineapple chunks.
In a small bowl, mix together sweet and sour sauce, brown sugar, soy sauce, and garlic powder. Pour on top of meatballs and vegetables.
Place the lid on the Instant Pot and turn the knob to SEALING.
Push the PRESSURE COOK or MANUAL button and set the timer for 7 minutes.
When the timer is finished, turn the knob to VENTING to do a QUICK RELEASE of the pressure. Remove the lid and stir.
Serve over rice as a main dish or serve with toothpicks for a yummy appetizer.
Notes
In a gallon-sized freezer meal bag, add all ingredients. Squeeze out as much air as possible and seal bag closed. Place freezer bag into freezer and it will last 60-90 days. When ready to use, spray inside of slow cooker with non-stick cooking spray and dump ingredients from bag into slow cooker. Place lid on top and set timer for 2-3 hours on LOW heat or 1-2 hours on HIGH heat or until meatballs are warmed through. Follow the rest of the instructions as written.