Question: how to cook fully cooked meatballs?
Answer: Cooking Frozen Meatballs in Oven Place the meatballs on a baking sheet about a half-inch apart in a single layer to promote even cooking. Bake meatballs for 10 to 12 minutes, or until heated through. If using a convection oven, bake for eight to 10 minutes. Once finished, remove from the oven and coat with BBQ sauce.