Drain and rinse the chickpeas, then pat them thoroughly dry with a paper towel to ensure a crispy texture.
Place the chickpeas, ground turkey, garlic, parsley, cumin, coriander, salt, and pepper into a food processor.
Pulse the mixture until well combined but still slightly coarse, avoiding a complete puree to maintain the traditional falafel bite.
Form the mixture into four equal-sized patties or six small rounds, pressing firmly so they hold their shape.
Heat the olive oil in a large non-stick skillet over medium-high heat until shimmering.
Cook the falafel for 4 to 5 minutes per side until the exterior is golden brown and the turkey is fully cooked through.
In a small bowl, whisk together the Greek yogurt, tahini, and lemon juice until the sauce is smooth and pourable.
Arrange the chopped cucumbers on a plate, top with the warm falafel patties, and finish with the lemon-tahini drizzle.