Rinse and drain the chickpeas, then pat them thoroughly dry with a paper towel to ensure a crispy texture.
Place the chickpeas, hemp hearts, egg whites, parsley, garlic, cumin, coriander, salt, and pepper into a food processor and pulse until a coarse, moldable meal forms.
Divide the mixture and shape into 4 or 5 small, even patties.
Heat the olive oil in a non-stick skillet over medium heat and sear the patties for 3 to 4 minutes per side until they are golden brown and firm.
While the falafel cooks, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until the sauce is smooth and creamy.
Assemble the bowl by layering the baby spinach, cucumber, and cherry tomatoes as a fresh base.
Top the vegetables with the warm falafel patties and drizzle the lemon-tahini sauce over everything before serving.