Fresh herbs combine with lean ground beef for an easy meatball recipe with a range of applications. Since this recipe uses lean ground beef, which traditionally contains about 7% fat, we’ve included lightly browned onions in the meat mixture to add flavor and moisture. When shaping the meatballs, be careful not to overwork the mixture as you form the balls, which will make them dense and tough. You’ll also want to keep the size of the meatballs consistent to ensure even cooking. Serve these bite-size morsels as an appetizer or hors d'oeuvre, or combine them with pasta or rice for the main course. They're also great stirred into soup.