Once the chickpeas are slightly cooled and dried, add to the food processor, along with gluten-free oat flour, salt, cumin, cardamom, coriander, and cayenne (optional). Mix to combine thoroughly, scraping down sides as needed. This may take up to 4-5 minutes to fully incorporate all of the spices and herbs. You're looking for a near paste with only very small bits of chickpeas and herbs.
Once your falafels are formed (~24 total // amount as original recipe is written // adjust if altering batch size), heat a large metal or cast-iron skillet over medium/medium-high heat. Once hot, add enough oil to create a thin layer on the bottom of the pan and wait 1-2 minutes for the oil to heat up. Then place only as many falafel as will fit comfortably in the pan and cook 2-3 minutes on each side. Once the bottom side is browned, flip gently as they can be fragile. Continue until all falafel are cooked. Adjust heat as needed if they're browning too quickly, or aren't cooking quickly enough.
*Nutrition information is a rough estimate calculated with 1/3 cup (80 ml) grape seed oil for cooking 24 falafel.
*Recipe adapted from the talented Tori Avey.