Cook the rice: Rinse rice until water runs clear. Cook according to package directions with a bay leaf and a pinch of salt.
Fluff and let it cool slightly.
Make the marinade: In a bowl, whisk Greek yogurt, olive oil, garlic, lemon juice and zest, oregano, cumin, salt, and pepper.
Prep the chicken: Slice chicken breasts into cutlets or bite-size pieces for faster cooking. Toss in the marinade. Let it sit at least 20 minutes, or up to 12 hours in the fridge.
Make the sauce: Stir together Greek yogurt, grated cucumber (squeezed dry), olive oil, lemon juice, garlic, salt, and pepper.
Chill until serving.
Prep the vegetables: Dice cucumber and pepper, slice onions, halve tomatoes, and chop herbs. Keep them chilled and separate for meal prep.
Cook the chicken: Heat a large skillet over medium-high. Add a light drizzle of oil.
Shake excess marinade off the chicken and sear in batches 3–5 minutes per side until browned and cooked through. Rest 5 minutes, then slice if needed.
Assemble the bowls: Add a scoop of rice, then chicken, veggies, olives, and feta. Spoon on the yogurt sauce.
Finish with fresh herbs and a squeeze of lemon.
For meal prep: Portion rice and chicken into containers. Keep fresh veggies and sauce separate until serving for best texture.