Step 1: Marinate the Chicken : In a bowl, whisk together olive oil, lemon juice, garlic, vinegar, oregano, cumin, paprika, coriander, salt, and pepper. Add the chicken and coat well with the marinade. Cover and refrigerate for at least 30 minutes (2 hours for deeper flavor).
Step 2: Prepare the Tzatziki Sauce : Grate cucumber and squeeze out excess water using a kitchen towel. In a bowl, combine Greek yogurt, cucumber, garlic, lemon juice, olive oil, and dill. Season with salt and pepper. Stir well and chill until ready to serve.
Step 3: Cook the Chicken : Heat a grill pan or skillet over medium-high heat. Add marinated chicken and cook for 6–7 minutes per side, until golden and fully cooked (internal temp: 165°F / 74°C). Rest for 5 minutes, then slice into strips.
Step 4: Prepare the Bowl Base : In serving bowls, layer cooked rice (or quinoa) as the base. Add chopped lettuce or spinach on one side.
Step 5: Assemble the Bowls : Add sliced chicken on top of rice. Arrange cucumber, tomatoes, onions, olives, and feta around the chicken. Drizzle generously with tzatziki sauce. Garnish with parsley and a squeeze of lemon.