oak the beans in water to cover overnight. Drain. If skinless beans are unavailable, rub to loosen the skins, then discard the skins. Pat the beans dry with a towel.
Grind the beans in a food mill or meat grinder. If neither appliance is available, process them in a food processor but only until the beans form a paste. (If blended too smoothly, the batter tends to fall apart during cooking. ) Add the scallions, garlic, cilantro, cumin, baking powder, cayenne, salt, pepper, and coriander, if using. Refrigerate for at least 30 minutes.
Shape the bean mixture into 1-inch balls. Flatten slightly and coat with flour.
Heat at least 1½-inches of oil over medium heat to 365 degrees.
Fry the patties in batches, turning once, until golden brown on all sides, about 5 minutes. Remove with a wire mesh skimmer or slotted spoon. Serve as part of a meze or in pita bread with tomato-cucumber salad and tahina sauce.
A / B / C / D / E / F / G / H / I / J / K / L / M / N / O / P / Q / R / S / T / U / V / W / X / Y / Z