Pat the chicken breast dry with a paper towel and season both sides with half of the cumin, garlic powder, sea salt, and black pepper.
Rinse and drain the chickpeas, then pat them completely dry; toss them in a small bowl with the remaining spices.
Heat the olive oil in a non-stick skillet over medium-high heat.
Add the chicken breast to the skillet and cook for 5-7 minutes per side until golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan to rest, then add the seasoned chickpeas to the same skillet.
Sauté the chickpeas for 4-5 minutes, shaking the pan frequently, until the skins are crisp and slightly browned.
In a small jar or bowl, whisk together the tahini, lemon juice, and 1 tablespoon of warm water until the sauce is smooth and pourable.
Slice the rested chicken into strips.
Assemble the bowl by placing the baby spinach at the base, then topping with diced cucumber, halved cherry tomatoes, sliced chicken, and crispy chickpeas.
Drizzle the lemon-tahini sauce over the top and garnish with chopped fresh parsley.