Place a baking sheet in the oven and preheat the oven to 450˚F with the baking sheet inside.
Meanwhile, in a food processor combine garbanzo beans, chopped onion, garlic cloves, cilantro leaves, tahini, cumin, cayenne, salt, and pepper; process until finely chopped and the mixture holds together.
Scrape the mixture into a mixing bowl.
Stir in the pork rind crumbs.
Pinch off from the mixture to make 12 balls or patties.
Using oven mitts, remove the baking sheet from the oven and grease the baking sheet with cooking spray.
Arrange the patties on the baking sheet and bake for 10 minutes.
Flip over the patties and continue to bake for 10 more minutes, or until golden and crisp.
In the meantime, prepare the Tahini Sauce by combining tahini, warm water, and lemon juice in a bowl; whisk until creamy.
Season with salt and pepper; taste and adjust with more salt, if needed. If it’s too thick, add a little more warm water until you reach desired consistency.
Remove falafel from oven and transfer to a serving plate.
Serve the falafel with warm pita bread, cucumber slices, and tahini sauce.