Preheat your oven to 400°F.
In a bowl, combine the lean ground turkey, large egg, whole wheat breadcrumbs, and grated Parmesan cheese. Season with your preferred spices such as salt, pepper, garlic powder, and dried oregano.
Mix the ingredients gently until well combined, ensuring not to overmix which can make the meatballs tough.
Shape the mixture into uniformly sized meatballs, approximately 1.5 inches in diameter, and place them on a lightly greased baking sheet.
Bake the meatballs in the preheated oven for 18-20 minutes, turning halfway through to ensure even browning.
While the meatballs are baking, use a spiralizer or vegetable peeler to create zucchini noodles from the medium zucchini. If desired, lightly sauté the noodles in a teaspoon of olive oil for 2-3 minutes until just tender.
Heat the tomato sauce in a small pan until warm. Once the meatballs are done, gently toss them in the sauce or serve the sauce on top of the zucchini noodles with meatballs placed on the side.
Plate the zucchini noodles, top with the baked turkey meatballs, drizzle any remaining tomato sauce, and garnish with a sprinkle of extra Parmesan cheese if desired.