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 evenly coated.
Heat the olive oil in a non-stick skillet over medium-high heat and add the spiced chicken.
Sauté the chicken for 6-8 minutes, stirring occasionally, until deeply browned and cooked through.
While the chicken cooks, dice the cucumber, halve the cherry tomatoes, and finely mince the red onion and parsley.
Combine the chopped vegetables in a small bowl to create a quick Mediterranean salsa.
In a separate small ramekin, whisk together the tahini, lemon juice, and water until the sauce is smooth and pourable.
Place the warm cooked brown rice in the center of a serving bowl.
Top the rice with the sautéed chicken and the fresh vegetable salsa.
Drizzle the creamy tahini sauce over the entire bowl and serve immediately.