Slice the chicken breast into thin, even strips for quick cooking.
In a medium bowl, whisk together the olive oil, cumin, coriander, turmeric, garlic powder, paprika, sea salt, and black pepper.
Add the chicken strips to the bowl and toss until every piece is thoroughly coated in the spice marinade.
Heat a large non-stick skillet over medium-high heat and sauté the chicken for 6 to 8 minutes until golden brown and cooked through.
In a separate small bowl, toss the diced cucumber, tomato, and red onion with the lemon juice to create a bright salad.
Place the warm cooked basmati rice in the bottom of a serving bowl.
Arrange the spiced chicken and the fresh salad over the rice, then finish by drizzling the tahini over the entire bowl.