In a small bowl, whisk together the olive oil, cumin, coriander, turmeric, garlic powder, sea salt, and black pepper to create the marinade.
Slice the chicken breast into thin, bite-sized strips and toss with the spice marinade until every piece is evenly coated.
Heat a large non-stick skillet over medium-high heat and sear the chicken for 6-8 minutes, turning occasionally until golden brown and cooked through.
While the chicken is cooking, finely dice the cucumber, halve the cherry tomatoes, and mince the red onion; combine them in a bowl for the salad.
In a separate small ramekin, whisk the Greek yogurt, tahini, and lemon juice together until the sauce is smooth and pourable.
Assemble the bowl by placing the warm basmati rice at the bottom and topping it with the spiced chicken and the fresh vegetable salad.
Finish the dish by drizzling the creamy tahini-yogurt sauce over the chicken and vegetables.