Meatballs are a classic Italian recipe that have been remixed and reimagined every which way over the years—and in probably every country. There are miniature cocktail-size versions on toothpicks, made sticky with Asian sauces. There are giant-sized balls stuffed with more goodness inside. Then there are dishes made out of meatballs and we’re not just talking pasta. Think: meatball soups, pizza, casseroles, baked eggs and yes, grilled cheese layered with the protein bites.