Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Rinse and drain the chickpeas thoroughly, then pat them dry with a paper towel to ensure maximum crispiness.
In a food processor, combine the chickpeas, hemp hearts, parsley, cilantro, garlic, cumin, coriander, sea salt, and black pepper.
Pulse the mixture until it is well combined but still maintains a slightly coarse, pebbly texture; avoid over-processing into a smooth paste.
Transfer the mixture to a medium bowl and stir in the liquid egg whites and coconut flour until the dough is cohesive.
Scoop the mixture and form into 6 to 8 small, even patties, placing them on the prepared baking sheet.
Bake for 22-25 minutes, flipping the patties carefully halfway through, until they are firm and golden brown on both sides.
While the falafel bakes, prepare the sauce by whisking together the Greek yogurt, tahini, and lemon juice in a small bowl until smooth.
Serve the warm falafel immediately, drizzled with the zesty tahini sauce.