Marinate the Chicken: In a bowl, mix all the ingredients for the chicken marinade. Add the chicken pieces, coat well, and marinate for 30 minutes to 2 hours.
Make Tzatziki Sauce: Combine yogurt, cucumber, lemon juice, dill, garlic, salt, and pepper in a bowl. Stir well, refrigerate.
Cook the Chicken: Heat olive oil in a skillet over medium-high heat. Add marinated chicken in a single layer and cook for 4–5 minutes per side until golden and cooked through.
Assemble the Bowls: Layer the cooked rice, chicken, tomatoes, cucumber, red onion, olives, and feta cheese in bowls. Top with tzatziki sauce.