Note: You can also freeze the meatballs before cooking. In fact, according to the USDA, ground beef that isn't yet cooked can be frozen for up to 3-4 months. Cooked and frozen meatballs are best enjoyed within 3 to 4 months. You can freeze the meatballs in the freezer for 3-4 months before they start to lose their quality and freshness.
This is a great way to have a meal prepared and ready to simply pick up and cook. Cooking them helps reduce the chance of contamination by bacteria. Freezing meatballs isn't as simple as quickly freezing the meatballs that you can buy at the supermarket in a bag.
