Drain and rinse the canned chickpeas, then pat them thoroughly dry with a paper towel to ensure the falafel achieves a crisp exterior.
Place the dried chickpeas in a food processor and pulse until they are broken down into a coarse meal, avoiding over-processing into a paste.
In a medium mixing bowl, combine the pulsed chickpeas, ground turkey, egg white, chopped parsley, cumin, garlic powder, sea salt, and black pepper.
Mix the ingredients by hand until well combined, then form the mixture into 4 to 5 small, even patties about half an inch thick.
Heat the olive oil in a non-stick skillet over medium-high heat and sear the patties for 4-5 minutes per side until they are cooked through and golden-brown.
While the falafel cooks, whisk together the non-fat Greek yogurt, tahini, and lemon juice in a small bowl until the drizzle is smooth and pourable.
Arrange the fresh spinach on a plate, top with the warm falafel patties, and finish by drizzling the lemon-tahini sauce over the top.