Slice the chicken breast into thin, even strips for quick cooking.
In a small bowl, whisk together the cumin, paprika, turmeric, garlic powder, sea salt, and black pepper.
Toss the chicken strips with the spice blend and 0.5 tablespoon of olive oil until thoroughly coated.
Heat the remaining 0.5 tablespoon of olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sauté for 6 to 8 minutes until golden brown and cooked through.
In a separate small jar, whisk the Greek yogurt, tahini, and 0.5 tablespoon of lemon juice until smooth.
Combine the diced cucumber, halved cherry tomatoes, and minced red onion with the remaining 0.5 tablespoon of lemon juice in a bowl.
Assemble the bowl by placing the warm brown rice at the base and topping it with the spiced chicken and fresh cucumber salad.
Finish by drizzling the creamy tahini-yogurt sauce over the top and serve immediately.