Drain and rinse the chickpeas thoroughly to remove excess sodium.
Pulse the chickpeas, liquid egg whites, hemp hearts, ground cumin, garlic powder, sea salt, and black pepper in a food processor until a coarse, moldable paste forms.
Shape the chickpea mixture into 4 equal-sized patties using your hands.
Heat the avocado oil in a large non-stick skillet over medium heat and sear the patties for 4-5 minutes per side until they are golden and crispy.
In a small mixing bowl, whisk together the non-fat Greek yogurt, tahini, lemon juice, and half of the fresh parsley to create a smooth, velvety dressing.
Dice the cucumber and halve the cherry tomatoes to prepare the vegetable base.
Divide the cucumber and tomatoes into a serving bowl, top with the warm falafel patties, and drizzle generously with the lemon-herb tahini sauce and remaining parsley.