How To Reheat Frozen Precooked Meatballs. Meatballs that are precooked then frozen need only to be reheated before eating. 30 minutes, or until hot all the way through.

You can also reheat meatballs on the stovetop in a simmering sauce or soup. To reheat, place the frozen meatballs and sauce in a frying pan or baking dish and cover with foil. Bake at 150°c/300°f for approx.