In a food processor, pulse the canned chickpeas until they are broken down into a coarse, crumbly texture but not a smooth paste.
In a large mixing bowl, combine the ground turkey, pulsed chickpeas, egg, ground cumin, garlic powder, sea salt, black pepper, and chopped fresh parsley until well incorporated.
Form the mixture into four small, thick patties, pressing firmly with your hands so they hold their shape during the cooking process.
Heat the extra virgin olive oil in a non-stick skillet over medium heat and sear the patties for 5-6 minutes per side until golden brown and cooked through.
While the patties cook, whisk together the Greek yogurt, tahini, and lemon juice in a small bowl until the sauce is smooth and zesty.
Arrange the sliced cucumbers on a plate, place the warm falafel patties on top, and finish with a generous drizzle of the tahini sauce.