01 - In a large bowl, gently mix ground turkey, breadcrumbs, Parmesan, egg, minced garlic, parsley, oregano, salt, pepper, and milk until just combined. Avoid overmixing.
02 - Shape the mixture into 16 to 18 uniform meatballs.
03 - Heat 2 tablespoons olive oil in a large skillet over medium heat. Add meatballs in batches and brown evenly on all sides, about 5 minutes total. Remove and set aside.
04 - In the same skillet, heat 2 tablespoons olive oil. Sauté chopped onion until softened, approximately 4 minutes, then add garlic and cook an additional minute.
05 - Add crushed tomatoes, dried basil, oregano, sugar if using, salt, and pepper. Bring to a gentle simmer.
06 - Carefully place browned meatballs into the simmering sauce. Cover and maintain low heat for 20 to 25 minutes, ensuring meatballs reach an internal temperature of 165°F.
07 - Adjust seasoning to taste. Stir in fresh basil if desired. Serve hot alongside pasta, polenta, or crusty bread.