Measure out 15 oz of dry chickpeas into a large bowl. Sprinkle the baking soda over the chickpeas to help them soften. Add enough water to fully submerge the chickpeas and soak for 24 hours.
Drain the chickpeas and place them into a food processor. Add red onion, garlic, fresh parsley, and dill. Then add cumin, coriander, cayenne, black pepper, sesame seeds, and baking powder.
Pulse in the food processor until a coarse mixture forms. It should stick to itself and be able to form into a ball shape.
Transfer the mixture to a large bowl and shape with wet hands into the desired shape. Place back into the bowl and chill for 2 hours to fully develop the flavor. Prior to frying, let it rest at room temperature for 30 minutes.
Prep a deep fryer or heavy-bottom pot with enough oil to cover 3/4 of the falafel log (do not overfill the pot) and heat to 350°F.
Carefully place the falafel log into the oil. Deep fry for 7-10 minutes, until the log is golden brown and cooked through. Use tongs to roll the log around in the oil so that it cooks evenly.
Transfer the cooked log to a plate lined with paper towels to absorb any excess oil. Cool for 10 minutes to set the inside of the falafel.
Drizzle tahini over the "poo poo" as desired. Enjoy!