In a small mixing bowl, whisk together the olive oil, ground cumin, smoked paprika, turmeric, garlic powder, sea salt, and black pepper to create a spice paste.
Slice the chicken breast into thin strips and toss thoroughly in the spice paste until every piece is evenly coated.
Heat a large non-stick skillet over medium-high heat and sear the chicken for 6 to 8 minutes, turning occasionally, until golden brown and cooked through.
While the chicken is cooking, prepare the sauce by whisking together the Greek yogurt, tahini, and lemon juice in a small bowl until smooth.
Dice the cucumber, halve the cherry tomatoes, and finely mince the red onion.
Assemble the bowl by placing the warm cooked basmati rice at the bottom.
Arrange the spiced chicken, cucumber, tomatoes, and red onion over the rice.
Drizzle the yogurt-tahini sauce generously over the top and garnish with freshly chopped parsley.