There are two schools of thought when it comes to covering meatballs when cooking in the sauce. Some people believe that covering the meatballs allows them to cook evenly and absorb more flavor from the sauce. Others believe that leaving the meatballs uncovered allows the sauce to reduce and thicken, resulting in a richer flavor.u003cbr/u003eIf you're looking for evenly cooked meatballs with maximum flavor absorption, cover them while they cook. If you're looking for a thicker, richer sauce, leave them uncovered. Either way, your guests will be happy with these delicious party meatballs!