One way to make frozen meatballs taste better is to add a flavorful sauce. You can make your own sauce from scratch, or use a store-bought variety that you like. A classic marinara sauce pairs nicely with meatballs, but you could also experiment with different flavors like barbecue or teriyaki. If you want to keep it simple, try adding some diced onions and garlic to the sauce for an extra layer of flavor. Another way to enhance the flavor of frozen meatballs is to bake them in the oven instead of microwaving them. This will give them a nice crunchy exterior and help lock in the juices. You can also add some herbs and spices while they’re cooking, such as oregano, basil, paprika, and black pepper.