How do you figure out if meatballs are done all the way through without breaking one open?

Meatballs are basically little round meatloaves. Making meatballs up and then checking the temperature for doneness is best done with an instant read thermometer. Meatballs are mixed up with spices, herbs, breadcrumbs or rice, eggs, and milk. Usually, a mixture of beef or veal and ground pork, and then cooked for consumption. You can cook them in the oven or pan fry them. I personally prefer to cook them in the oven unless I am making meatball soups, then the meatballs are cooked in the soup broth.