In a small bowl, whisk together 0.5 tbsp olive oil, minced garlic, cumin, coriander, turmeric, sea salt, and black pepper to create a marinade.
Coat the chicken breast evenly with the spice marinade and let it marinate for at least 10 minutes.
Heat the remaining 0.5 tbsp olive oil in a skillet over medium-high heat and cook the chicken for 6-7 minutes per side until golden brown and cooked through.
While the chicken is cooking, whisk together the Greek yogurt, tahini, and lemon juice in a small ramekin until the sauce is smooth.
Remove the chicken from the skillet, let it rest for 3 minutes, then slice it into thin strips.
Assemble the bowl by placing the cooked basmati rice at the base and topping it with the sliced chicken, diced cucumber, halved cherry tomatoes, and sliced red onion.
Drizzle the creamy tahini-yogurt sauce over the entire bowl and serve immediately.