In a large mixing bowl, place the besan, salt, chilli powder. Chop finely the chilli and coriander [cilantro] and toss in and grate in the ginger. Mix in the water removing any lumps that may have formed. Tactile is best – I just do this with my fingers! When you have an even smooth mixture, leave it to sit for at least half an hour or if you can for up to two hours.