Place the cranberry sauce, orange juice, honey, and red pepper flakes in the crock of a slow cooker. Whisk until well combined.
Place the meatballs in the crock pot and stir until coated.
Cook for 2 hours on high or 4 hours on low. Keep warm in slow cooker, stirring occasionally until ready to serve. Garnish with parsley or orange zest, if desired.
*Nutritional information is an estimate. Please consult a doctor or nutritionist for the most accurate nutritional info.