1. Place garbanzos in a large pot, and cover with water. Let soak 24 hours, and rinse again. Place the garbanzo beans, onion, and potato in the bowl of a food processor. Cover, and process until finely chopped. Leaving about 1 cup of the garbanzo bean mixture in the food processor bowl, pour the rest into a mixing bowl.
2. Add the garlic, cilantro, cumin, salt, and cayenne pepper to the garbanzo bean mixture in the food processor bowl; process on low to blend thoroughly. Return the reserved garbanzo bean mixture to the food processor bowl.
3. Add the lemon zest and juice, and garlic oil, and process on low into a coarse meal. Cover, and refrigerate 2 hours. Preheat oven to 300 degrees F and line baking tray with parchment. Stir the baking soda, flour, and bread crumbs into the garbanzo bean mixture until evenly blended.
4. Using damp hands, form the mixture into 1 1/2" diameter balls then lightly flatten so they are about 3/4" tall. Place on prepared baking tray, and bake for about 10 minutes, flip the falafel and bake the other side for another 10 minutes.
5. Pour canola oil into a pan about 1/2" deep, and heat over medium-high heat. Cook the falafel, turning so the sides are evenly browned, about 5 minutes. Remove falafel from oil, and drain on paper towels. Repeat to cook remaining falafel.
This is great as traditional served on pita with vegan tzatziki and lettuce (try it with my cucumber salsa recipe: http://vegweb.com/index.php?topic=40033.0 [1]), or you can also put them on mini hamburger buns and use them for vegan sliders.
Source of recipe: I wrote this.