01 - In a large bowl, gently mix ground turkey, egg, breadcrumbs, Parmesan, parsley, garlic, oregano, salt, pepper, and milk until just combined.
02 - Form the mixture into 16 meatballs, approximately 1.5 tablespoons each.
03 - Heat 2 tablespoons olive oil in a large skillet over medium heat. Brown meatballs on all sides, about 5 to 7 minutes. Remove and set aside.
04 - In the same skillet, heat 1 tablespoon olive oil. Sauté the onion over medium heat until softened, about 4 minutes. Add garlic and cook for 1 minute.
05 - Add crushed tomatoes, basil, oregano, sugar, salt, and optional chili flakes. Stir and bring to a simmer.
06 - Nestle browned meatballs into the sauce. Cover and simmer on low heat for 20 minutes until cooked through.
07 - Sprinkle fresh basil over the meatballs and serve hot with pasta, rice, or crusty bread.