Slice the chicken breast into thin bite-sized strips and place them in a small mixing bowl.
Toss the chicken with the cumin, coriander, turmeric, garlic powder, sea salt, and black pepper until every piece is thoroughly coated.
Heat the olive oil in a non-stick skillet over medium-high heat.
Add the chicken to the skillet and sauté for 6 to 8 minutes, stirring occasionally, until the exterior is golden brown and the chicken is cooked through.
While the chicken is cooking, finely dice the cucumber, tomatoes, and red onion.
In a small bowl, combine the diced vegetables with the lemon juice for a quick relish.
Place the warm cooked basmati rice in the bottom of a serving bowl.
Arrange the spiced chicken and the fresh vegetable salad on top of the rice.
Finish the dish by drizzling the tahini over the top and serve immediately.