In a small bowl, whisk together the cumin, coriander, turmeric, garlic powder, sea salt, and black pepper.
Rub the spice mixture evenly over the chicken breast until well coated on both sides.
Heat the olive oil in a skillet over medium-high heat and cook the chicken for 6-7 minutes per side until golden and cooked through.
While the chicken rests, whisk the tahini, lemon juice, and warm water in a small ramekin until reaching a smooth, drizzling consistency.
Dice the cucumber, halve the cherry tomatoes, and finely mince the red onion.
Slice the chicken into thin strips and arrange it over the cooked basmati rice in a serving bowl.
Top with the fresh cucumber, tomatoes, and onion, then finish by drizzling the lemon-tahini sauce over the entire bowl.