Make the flax egg by stirring ground flax seeds into the broth. Let it sit and thicken for 5 minutes.
Meanwhile, drain and rinse the chickpeas. Add them to a food processor along with the oat flour, parsley, onions, and seasoning.
Pulse it for 2-3 minutes. Pour in the flaxseed mixture and blend it until everything is combined. The mixture should look like a wet paste with a few chunks of chickpeas left.
Transfer the mixture to a large bowl, cover it, and place it in the refrigerator for 15 minutes. Heat a thin layer of cooking oil in a large skillet over medium heat.
Roll 1/4 cup-sized balls then press them down into tightly packed discs. Place them on parchment paper or a nonstick mat until the oil is hot.
Add a few patties at a time to the sizzling hot pan. Cook them for 3-4 minutes on each side or until they're golden brown and crispy on the outside.