Preheat the oven to 500°F. Grease 9x13 baking dish or mini muffin pan with cooking spray.
In a small bowl, stir together the breadcrumbs and milk and let sit for 5 minutes.
In a large bowl, combine the ground turkey, garlic, onion, egg, salt, pepper and breadcrumb mixture, mixing with your hands just until combined.
Using your hands, break off 2 or 3 tablespoons of the meat mixture and roll it into a ball. Arrange the meatballs in a single layer in the prepared baking dish.
Bake the meatballs for 12 to 15 minutes or until they are cooked through. While the meatballs bake, make the sauce.