Slice the chicken breast into bite-sized pieces and place them in a bowl.
Toss the chicken with olive oil, cumin, coriander, turmeric, garlic powder, sea salt, and black pepper until evenly coated.
Heat a large non-stick skillet over medium-high heat and add the spiced chicken pieces.
Sauté the chicken for 6 to 8 minutes, turning occasionally, until golden brown and cooked through.
In a small bowl, combine the diced cucumber, Roma tomato, and minced red onion to create a simple salad.
Place the warm cooked brown rice into a serving bowl as the base.
Top the rice with the sautéed chicken and the fresh vegetable salad.
In a small ramekin, whisk together the tahini and lemon juice until smooth, adding a teaspoon of water if needed to reach a drizzling consistency.
Drizzle the tahini sauce over the bowl and garnish with fresh parsley before serving.