Place all the ingredients for the tahini sauce in the food processor and process until smooth, it should be a thin sauce. If it becomes too thick add more water or if you really like the tang add more lemon juice.
Soak the garbanzo beans overnight -drain. In a food processor add all the other ingredients except the flour and process until crumbly. Pour into a large bowl, add the flour a a tablespoon at the time and mix well. Keep adding flour until you can easily form the mixture into balls or patties without them falling apart. Place in the refridgerator and allow to chill while you make the Tahini Sauce.