Slice the chicken breast into thin, even strips for quick cooking.
In a medium bowl, whisk together the olive oil, lemon juice, minced garlic, cumin, paprika, turmeric, cinnamon, sea salt, and black pepper.
Add the chicken strips to the marinade, tossing well to coat, and let sit for at least 10 minutes.
Heat a non-stick skillet over medium-high heat and sauté the chicken for 6 to 8 minutes until golden brown and cooked through.
While the chicken cooks, dice the cucumber, halve the cherry tomatoes, and finely slice the red onion.
Place the warm cooked brown rice in a serving bowl and top with the spiced chicken and the fresh vegetable mixture.
Finish the bowl by drizzling the creamy tahini over the top and serve immediately.