Savory ingredients like soy sauce and red pepper flakes pair perfectly with the sweeter ingredients like light brown sugar and pineapple chunks. This makes this slow cooker sweet and sour meatball recipe so addicting!
In a saucepan over medium high heat, combine apple cider vinegar, brown sugar, ketchup, soy sauce, red pepper flakes, and cajun seasoning. In a separate small bowl, mix cornstarch and water, then add to the saucepan. Whisk often until the sauce starts to thicken, about 10 minutes.
Add the meatballs and pineapple chunks to the slow cooker. Add the sweet and sour sauce and cover. Cook 4 hours on low, or 2 hours on high.
Garnish with fresh chopped cilantro or parsley. Serve over rice, or on its own with cocktail picks. Enjoy!