01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - Combine ground turkey, egg, breadcrumbs, garlic, parsley, oregano, salt, pepper, and Parmesan in a large bowl; mix until just incorporated.
03 - Shape mixture into 16 equal meatballs and arrange on the prepared baking sheet.
04 - Bake for 18 to 20 minutes until cooked through and golden brown.
05 - Heat 1 tbsp olive oil in a skillet over medium heat; sauté onion for 3 to 4 minutes until softened, then add garlic and cook 30 seconds more. Stir in crushed tomatoes, basil, oregano, chili flakes, salt, and pepper; simmer for 10 minutes, stirring occasionally.
06 - Gently transfer baked meatballs into the tomato sauce and simmer for 5 minutes to meld flavors.
07 - Heat 1 tbsp olive oil in a separate skillet over medium-high heat; sauté zucchini noodles for 2 to 3 minutes until just tender. Season with salt.
08 - Plate zucchini noodles and top with meatballs and sauce. Garnish with extra parsley or Parmesan as desired.