Slice the chicken breast into thin strips and place them in a medium mixing bowl.
Toss the chicken with the olive oil, cumin, coriander, turmeric, garlic powder, sea salt, and black pepper until every piece is evenly coated.
Heat a large non-stick skillet over medium-high heat and add the seasoned chicken, sautéing for 6 to 8 minutes until golden brown and cooked through.
While the chicken cooks, combine the diced cucumber, tomato, red onion, and fresh parsley in a small bowl to create the salad garnish.
In a separate small jar or bowl, whisk together the tahini and lemon juice, adding a teaspoon of warm water at a time until the sauce reaches a smooth, pourable consistency.
Assemble the bowl by placing the warm brown rice at the base, topping it with the spiced chicken and the fresh vegetable salad.
Finish the dish by drizzling the creamy lemon-tahini sauce over the top before serving.