Preheat the oven to 400°F (200°C).
In a large mixing bowl, combine ground turkey, breadcrumbs, Parmesan, garlic, oregano, parsley, egg, salt, and pepper.
Form the mixture into 1-inch meatballs and arrange them on a baking sheet lined with parchment paper.
Bake the meatballs in the preheated oven for 20-25 minutes or until cooked through.
While the meatballs are baking, prepare the tzatziki sauce by combining Greek yogurt, grated cucumber, dill, and lemon juice in a bowl.
Chill the tzatziki in the refrigerator until ready to serve.
Once the meatballs are done, allow them to rest for a few minutes before serving them with tzatziki on the side.