Preheat a non-stick skillet over medium heat and add the olive oil.
In a mixing bowl, combine the lean ground turkey, egg, minced garlic, chopped parsley, dried oregano, salt, and pepper.
Form the mixture into small meatballs, about 1 to 1.5 inches in diameter.
Place the meatballs in the skillet and cook, turning occasionally, until they are browned on all sides and cooked through, about 8-10 minutes.
While the meatballs are cooking, use a spiralizer to turn the zucchini into noodles.
Lightly sauté the zucchini noodles in a separate pan for 2-3 minutes until just tender, or steam them briefly if preferred.
Plate the zucchini noodles, top them with the cooked turkey meatballs, and drizzle the marinara sauce over the top.
Garnish with additional fresh parsley if desired, and serve warm.