Slice the chicken breast into thin bite-sized strips and place them in a bowl.
Toss the chicken with the cumin, smoked paprika, turmeric, garlic powder, sea salt, and black pepper until evenly coated.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sauté for 6-8 minutes until golden brown and cooked through.
While the chicken is cooking, dice the cucumber and cherry tomatoes, and finely mince the red onion.
In a small ramekin, whisk together the Greek yogurt and lemon juice until smooth.
Place the warm cooked brown rice in the bottom of a bowl.
Top the rice with the spiced chicken, diced cucumber, tomatoes, and red onion.
Drizzle the lemon-yogurt sauce over the top and serve immediately.