Rinse and drain the canned chickpeas, then pat them dry with a paper towel to ensure a crispy texture.
Place the chickpeas, edamame, garlic, parsley, cumin, coriander, sea salt, black pepper, and egg into a food processor.
Pulse the mixture until it forms a coarse, moldable paste, being careful not to over-process into a smooth puree.
Scoop the mixture and form into 4 to 5 even patties, pressing them firmly so they hold their shape.
Heat the olive oil in a large non-stick skillet over medium-high heat.
Place the patties in the skillet and cook for 4 to 5 minutes per side until they are deeply golden brown and crisp.
While the falafel cooks, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until smooth.
Plate the warm falafel patties and drizzle generously with the zesty lemon-tahini sauce before serving.