These flavor-packed bites are an easy crowd-pleaser. Plus, you can make the meatballs in advance and freeze them either cooked or uncooked. Reheat frozen cooked meatballs in a 350°F oven for 10 to 12 minutes, or until thoroughly heated. Bake uncooked frozen meatballs in a 350°F oven for 25 minutes. Freeze sauce separately; thaw in refrigerator, and warm on the stove until hot.