In a small bowl, whisk together the ground cumin, coriander, turmeric, sea salt, black pepper, and minced garlic with the olive oil to create a marinade.
Slice the chicken breast into thin, bite-sized strips and toss thoroughly in the spice marinade until every piece is well coated.
Heat a non-stick skillet over medium-high heat and sear the chicken for 5-7 minutes, turning occasionally until cooked through and slightly charred on the edges.
While the chicken is cooking, prepare the fresh salad by tossing the diced cucumber, halved cherry tomatoes, and minced red onion with half of the lemon juice.
In a separate small ramekin, whisk together the plain Greek yogurt, tahini, and the remaining lemon juice until the sauce is smooth and creamy.
Assemble the bowl by placing the warm, fluffy basmati rice at the base and topping it with the spiced chicken and the crisp cucumber-tomato salad.
Finish the dish by drizzling the creamy yogurt-tahini sauce over the top before serving immediately.