Slice the chicken breast into thin, bite-sized strips.
In a small bowl, whisk together the olive oil, cumin, paprika, turmeric, garlic powder, salt, and pepper.
Toss the chicken strips in the spice marinade until every piece is thoroughly coated.
Heat a large non-stick skillet over medium-high heat and sear the chicken for 6 to 8 minutes until golden brown and cooked through.
In a separate small bowl, stir together the Greek yogurt, tahini, and lemon juice until smooth.
Place the warm cooked basmati rice into a serving bowl.
Layer the spiced chicken, diced cucumber, halved cherry tomatoes, and minced red onion over the rice.
Finish by drizzling the creamy lemon-tahini sauce over the bowl and serve immediately.