Step 3
Blend garbanzo beans, onion, parsley, garlic, flour, lemon juice, salt, cumin, coriander, baking soda, and cayenne pepper together in a food processor, scraping down the sides of the bowl as necessary, until mixture is finely ground and holds together when pressed. Transfer garbanzo mixture to a bowl, cover with plastic wrap, and refrigerate until flavors blend, 1 to 2 hours.