Pat the chicken breast dry and season with half of the sea salt, black pepper, and garlic powder.
In a small bowl, roughly mash the chickpeas with the ground cumin, chopped parsley, and the remaining garlic powder, then form the mixture into three small, flat patties.
Heat the olive oil in a non-stick skillet over medium heat and cook the chicken breast for 6 to 7 minutes per side until golden brown and cooked through.
Remove the chicken from the skillet to rest, then in the same pan, sear the chickpea patties for 3 minutes per side until they develop a crispy, golden exterior.
While the patties cook, whisk together the tahini, nonfat Greek yogurt, and lemon juice in a small ramekin, adding a teaspoon of water if needed to reach a drizzling consistency.
Slice the rested chicken breast into strips and arrange them in a large bowl alongside the fresh spinach, diced cucumber, and halved cherry tomatoes.
Place the crispy falafel patties on top, drizzle the entire bowl with the lemon-tahini sauce, and season with any remaining salt and pepper.