Heat a grill pan until hot.
Drain the chick peas. Place in food processor along with cilantro, parsley, onion, cumin, cayenne, garlic, lemon juice, and salt and pepper. Pulse until well blended. Consistency should be in the form of a paste. Place mixture in a bowl and form into 2-inch patties (see Cook's Note).
In a large skillet over medium-high heat, add grapeseed oil. Add patties and cook for 3 to 4 minutes on each side. Remove from pan and place on a paper towel lined platter to drain. Set aside and keep warm.
To a hot grill pan, add flatbread to mark and warm on each side for 1 minute. Remove. Add 2 to 3 patties to each warm flatbread. Top with some arugula, tomato, onion and Smoky Tahini Sauce
In a bowl, whisk all ingredients until a creamy consistency is reached.
If dry add 1 tablespoon water. If too wet, add chick pea flour.