Slice the chicken breast into thin bite-sized strips and toss in a bowl with the cumin, coriander, turmeric, garlic powder, paprika, sea salt, and black pepper until evenly coated.
Heat the olive oil in a non-stick skillet over medium-high heat. Add the chicken strips and sauté for 5-7 minutes, stirring occasionally, until the chicken is golden brown and cooked through.
While the chicken is cooking, dice the cucumber into small cubes, halve the cherry tomatoes, and finely mince the red onion.
In a small ramekin or bowl, whisk together the tahini, lemon juice, and water until the sauce reaches a smooth, pourable consistency.
Assemble the bowl by placing the warm cooked basmati rice at the base, then topping with the spiced chicken and the fresh vegetable salad.
Drizzle the lemon-tahini sauce over the entire bowl and serve immediately.