Oh my god, chijiki, that is NOT key lime pie!! Funnily enough I was just all over the net looking this up myself recently. I just put 'traditional key lime pie' into google and loads of good recipe sites came up. The hard part being, and I don't know if you are in the UK or US or where, but properly it should be made with florida key limes which are quite different from the bright green limes you get here in the uk and most grocery stores. I'm sure the limes we have here will still be as good though. Just don't use cream cheese, please...