In a small bowl, whisk together the cumin, coriander, turmeric, garlic powder, paprika, sea salt, and black pepper.
Toss the chicken pieces with the spice blend until every piece is evenly coated.
Heat the extra virgin olive oil in a large skillet over medium-high heat.
Add the seasoned chicken to the skillet and sauté for 6-8 minutes, stirring occasionally, until golden brown and cooked through.
While the chicken is cooking, prepare the dressing by mixing the Greek yogurt, tahini, and lemon juice in a small ramekin until smooth.
Assemble the bowl by placing the cooked brown rice at the base.
Top the rice with the warm sautéed chicken, diced cucumber, diced tomato, and red onion.
Drizzle the creamy yogurt-tahini sauce over the entire bowl and serve immediately.