Rinse the canned chickpeas and pat them completely dry with a paper towel to ensure a crispy texture.
In a food processor, combine the chickpeas, edamame, hemp hearts, parsley, cilantro, garlic, cumin, coriander, salt, pepper, and egg white.
Pulse the mixture until it forms a coarse, uniform meal that holds together when pressed, being careful not to over-process into a paste.
Form the mixture into 4 small, even patties about half an inch thick.
Heat the olive oil in a non-stick skillet over medium heat and sear the patties for 4 to 5 minutes per side until they are deeply golden and crispy.
In a small bowl, whisk together the Greek yogurt, tahini, and lemon juice until the sauce is smooth and creamy.
Arrange the baby spinach and diced cucumber on a plate, top with the warm falafel patties, and finish with a generous drizzle of the lemon-tahini sauce.