In a small bowl, whisk together the ground cumin, smoked paprika, ground turmeric, sea salt, black pepper, and half of the garlic powder.
Slice the chicken breast into thin strips and toss with the spice blend until evenly coated.
Heat the olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sear for 6-8 minutes, turning occasionally, until golden brown and cooked through.
While the chicken cooks, prepare the sauce by mixing the Greek yogurt with the lemon juice and the remaining garlic powder.
Dice the cucumber and halve the cherry tomatoes.
Place the warm cooked brown rice in a bowl and top with the spiced chicken, cucumber, and cherry tomatoes.
Drizzle the zesty yogurt sauce over the top and garnish with chopped parsley.