In a large bowl, whisk together 2 tablespoons of olive oil, oregano, garlic powder, onion powder, salt, and pepper.
Toss the cubed chicken in the marinade and let sit for at least 15 minutes.
Heat the remaining 1 tablespoon of olive oil in a large skillet over medium-high heat.
Add chicken to the skillet and cook for 8-10 minutes, stirring occasionally, until the internal temperature reaches 165 degrees Fahrenheit.
In a small mixing bowl, combine Greek yogurt, lemon juice, minced garlic, and fresh dill to create the tzatziki sauce.
Fold the lemon zest into the warm cooked rice.
Divide the lemon rice into four meal prep containers or bowls.
Top each bowl with equal portions of cooked chicken, cucumber, tomatoes, red onion, olives, and feta cheese.
Drizzle with the prepared tzatziki sauce before serving or storage.