Heat a few tablespoons of olive oil in large pan over medium heat. Sear the meatballs on each side for about 2 to 3 minutes per side, flipping them until most of the meatballs' surface is brown.
Add the meatballs into a pot of spaghetti sauce or pour the sauce directly into the meatball pan. Bring the sauce to a simmer and let the meatballs cook until cooked through in the sauce.