01 - Wrap the grated cucumber in a clean kitchen towel and squeeze firmly to remove all excess moisture. In a mixing bowl, combine the Greek yogurt, drained cucumber, minced garlic, chopped dill, lemon juice, extra-virgin olive oil, salt, and pepper. Stir until fully incorporated and smooth. Cover and refrigerate until ready to serve to allow the flavors to meld.
02 - In a large mixing bowl, combine the ground turkey, breadcrumbs, egg, minced garlic, grated onion, chopped parsley, chopped mint, dried oregano, ground cumin, salt, and black pepper. Gently mix with your hands until just combined, being careful not to overwork the mixture.
03 - Using your hands, roll the turkey mixture into 18 to 20 uniform walnut-sized meatballs, approximately 1.5 inches in diameter. Place them on a plate or tray as you work.
04 - Heat 2 tablespoons of olive oil in a large nonstick skillet over medium heat. Working in batches to avoid crowding, add the meatballs and cook for 8 to 10 minutes, turning every couple of minutes, until deeply golden brown on all sides and cooked through to an internal temperature of 165°F.
05 - Preheat the oven to 400°F. Arrange the meatballs on a parchment-lined baking sheet and brush or spray lightly with olive oil. Bake for 15 to 18 minutes, turning them halfway through, until golden brown and cooked through.
06 - Arrange the cooked meatballs on a serving platter alongside a generous bowl of tzatziki. Garnish with fresh herbs and lemon wedges. Serve with warm pita bread or a crisp side salad if desired.