Meatballs in sauce can also be served in a slow cooker set to warm.
If you don't have 2 (15x10x1-inch) pans, use any other shallow baking pans instead. Just make sure the meatballs are spread into a single layer in each pan.
How to Freeze Meatballs
Loosely pack cooled cooked meatballs in freezer-weight resealable plastic bags. Lay bags flat in freezer so meatballs will freeze individually. Store in freezer up to 3 months. Thaw in refrigerator several hours or overnight before cooking with the sauce until heated through, stirring frequently.