Slice the chicken breast into thin strips and toss in a bowl with cumin, coriander, turmeric, garlic powder, sea salt, and black pepper.
Heat olive oil in a skillet over medium-high heat and sauté the chicken until golden brown and cooked through, about 6-8 minutes.
In a small bowl, whisk together the Greek yogurt, tahini, and lemon juice until smooth to create the dressing.
Prepare the salad by combining the diced cucumber, halved cherry tomatoes, and minced red onion.
Assemble the bowl by placing the cooked brown rice at the base, topping with the spiced chicken and fresh vegetable salad.
Drizzle the creamy tahini-yogurt sauce over the top before serving.