Slice the chicken breast into thin, bite-sized strips.
In a small bowl, whisk together the olive oil, cumin, coriander, turmeric, garlic powder, sea salt, and black pepper to create a marinade.
Toss the chicken strips in the spice marinade until evenly coated.
Heat a non-stick skillet over medium-high heat and sear the chicken until golden brown and cooked through, approximately 6 to 8 minutes.
While the chicken is cooking, finely dice the cucumber, cherry tomatoes, and red onion.
Warm the pre-cooked basmati rice and place it at the base of a serving bowl.
Arrange the cooked chicken and the fresh vegetable salad over the rice.
In a small ramekin, whisk the tahini with lemon juice and a teaspoon of warm water until it reaches a smooth, pourable consistency.
Drizzle the tahini sauce over the entire bowl and serve immediately.