Preheat oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Place grated zucchini in a clean kitchen towel and squeeze firmly to remove all excess moisture.
In a large mixing bowl, combine the ground turkey, squeezed zucchini, breadcrumbs, egg, garlic, onion, Parmesan, parsley, oregano, salt, and pepper.
Mix by hand until just combined, taking care not to overwork the meat which can lead to a dense texture.
Form the mixture into 1.5-inch spheres, approximately 16 to 20 meatballs total.
Arrange the meatballs on the prepared baking sheet with at least 1 inch of space between each.
Bake for 18 to 20 minutes, or until the internal temperature reaches 165°F (74°C) using a meat thermometer.
Optional: Broil on high for 1-2 minutes for additional browning on the exterior.