For the Falafels:

Put all ingredients except the garbanzo flour and baking powder into a food processor. Process everything until it becomes smooth but not quite a puree. Add the flour and baking powder and pulse until mixed in. Scoop by tablespoon and form into balls. Flatten them slightly. At this point you can deep fry them, pan fry them or bake them. Fry in 2 inches of oil at 350 degrees for 5-7 minutes OR Pan fry in lightly oiled pan on medium-high heat until browned on both sides OR Bake in 400 degree oven for 20 minutes turning them half way through the baking process.

For the Tahini Sauce:

Whisk all of the ingredients together in a bowl.

To Assemble the Pita:

Cut 1/2 inch off the top of pita. Open pocket and insert lettuce, 2-3 falafel balls, 1/4 cup tomato, 4 slices of cucumber and 1-2 tablespoons of tahini sauce.