Slice the chicken breast into thin, bite-sized strips and place them in a bowl.
Toss the chicken with olive oil, cumin, coriander, turmeric, garlic powder, sea salt, and black pepper until evenly coated.
Heat a large non-stick skillet over medium-high heat and add the seasoned chicken.
Sear the chicken for 6-8 minutes, stirring occasionally, until the edges are golden brown and the meat is cooked through.
In a small mixing bowl, whisk together the Greek yogurt, tahini, and lemon juice until the sauce is smooth and creamy.
Prepare the fresh vegetables by dicing the cucumber, halving the cherry tomatoes, and finely mincing the red onion.
Place the warm cooked brown rice in the center of a serving bowl.
Top the rice with the spiced chicken and the prepared cucumber, tomatoes, and red onion.
Drizzle the yogurt-tahini sauce over the entire bowl and garnish with freshly chopped parsley before serving.