Squeeze the bread roll well to remove excess liquid.
Puree the garbanzo beans (chickpeas) with the bread roll, onions and garlic in a kitchen mixer.
Mix in the coriander, ground coriander, cumin, baking powder and egg adding breadcrumbs if the dough is too moist. Season with salt and pepper.
Heat the oil in a skillet and drop in spoonfuls of the mixture, flattening slightly. Fry on each side for 2-3 minutes until golden brown.