For this healthy turkey meatball recipe, lean ground turkey is mixed with fresh mushrooms, oats, garlic, spices and a little Parmesan cheese for a meatball that's moist, delicious and has more fiber and less saturated fat than a traditional beef and pork version. Serve these tasty meatballs over whole-grain pasta with fresh tomato sauce for a satisfying take on spaghetti and meatballs, and save the leftovers to stuff into sandwiches.