Slice the chicken breast into thin, bite-sized strips and place them in a small mixing bowl.
Toss the chicken with the olive oil, cumin, coriander, turmeric, garlic powder, sea salt, and black pepper until every piece is thoroughly coated in the spice blend.
Heat a non-stick skillet over medium-high heat and add the seasoned chicken, cooking for 6-8 minutes while stirring occasionally until the chicken is golden brown and cooked through.
While the chicken cooks, prepare the tahini sauce by whisking together the tahini, lemon juice, and water in a small ramekin until it reaches a smooth, pourable consistency.
In a separate small bowl, toss the diced cucumber, tomato, and red onion together to create a fresh Mediterranean salad.
Assemble the bowl by placing the warm cooked basmati rice at the bottom, then topping with the spiced chicken and the fresh vegetable salad.
Drizzle the creamy tahini sauce over the entire bowl and serve immediately while the chicken is still hot.