In a saucepan, mix the chickpea flour with the water and a pinch of salt, beating well to dissolve all the lumps.
Move the saucepan over the heat and bring the batter to a boil, stirring constantly. As it warms up from liquid it will begin to become denser.
Continue cooking, mixing for another 20 minutes to obtain a kind of polenta.
Transfer the mixture to a lightly greased bowl, leveling it with a spatula.
Let it cool completely. Turn out the panissa, which will have become solid, and cut it into cubes.
Season with salt, pepper, sliced spring onion, parsley, lemon juice and oil and pair with rucola and herbs. It can be served with pan-fried green beans and Genoese focaccia.