Drain and rinse the chickpeas, then pat them completely dry with a paper towel to ensure the patties stay firm.
In a food processor, pulse the chickpeas until they are broken down into small crumbles but not a smooth paste.
Add the ground chicken, chopped parsley, minced garlic, cumin, salt, and pepper to the food processor and pulse until just combined.
Form the mixture into 4 to 5 small patties, pressing firmly with your hands so they hold their shape during cooking.
Heat the olive oil in a non-stick skillet over medium heat until shimmering.
Place the patties in the skillet and cook for 4-5 minutes per side until they are golden-brown and the chicken is cooked through.
In a small bowl, whisk together the tahini, lemon juice, and water until the sauce is smooth, creamy, and pourable.
Serve the hot falafel patties immediately with the lemon-tahini sauce drizzled over the top for a fresh and zesty meal.