it can be pretty hard keeping your cool.
I try and learn from the tanties so as not to trigger them again. Like Jennifer I try to involve my boys in making their own food. Yasin can be really funny about presentaion so I ask him how many peices he wants his sandwich cut into (and get creative when he says three *sigh*) and what he wants on it and I do the same with Imran. It can get tricky when they have totally differant wants but they are both pretty resigned to deciding things with eenie, meenie, minie, moe (I rig it - it always ends on the opposite to the one it started on hehehe, so if one is on a shorter fuse they usually 'win').

Losing it every now and then is only human and IMO it can be turned to a positive cause - you can use it to set an example of apologising and explain that it's only normal to get angry sometimes but we have to make sure that we don't hurt other people with our anger.