- In a large bowl, combine the ground turkey, chopped onion, minced garlic, parsley, oregano, cumin, salt, and pepper. Mix everything together until it’s well combined. 
- Form the mixture into small meatballs, about 1 inch in diameter. 
- Heat olive oil in a large skillet over medium heat. Once hot, add the meatballs and cook, turning occasionally, until they’re browned and cooked through, about 10-12 minutes. 
- While the meatballs are cooking, prepare the quinoa or brown rice and chop the vegetables. 
- To assemble, divide the quinoa or rice among bowls. Top it with the cooked meatballs, cherry tomatoes, cucumber, olives, red onion, and crumbled feta cheese. 
- Drizzle the tzatziki sauce over the top and garnish with fresh lemon wedges. Serve immediately.