Slice the chicken breast into thin bite-sized strips and place them in a bowl.
Toss the chicken with cumin, coriander, turmeric, garlic powder, sea salt, and black pepper until evenly coated.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sauté for 6-8 minutes until golden brown and cooked through.
While the chicken cooks, whisk together the tahini and lemon juice in a small bowl, adding a teaspoon of water at a time until it reaches a smooth, drizzling consistency.
In a separate bowl, combine the diced cucumber, halved cherry tomatoes, and minced red onion.
Assemble the bowl by placing the warm cooked brown rice at the base.
Top the rice with the spiced chicken and the fresh vegetable salad.
Finish by drizzling the creamy tahini sauce over the entire bowl and serve immediately.