In reply to d80f0u:
It's all very personal, the best way is to try a few things and see what works best for you. For a first event you'll inevitably take too much and end up with most of it untouched - but that's better than running out!
I've tried loads of things over the years, here's what I currently go with.
For hill food during the day I don't eat a lot. maybe a bar or two of some sort (coconut bars are good as they're quite moist and easy to swallow). And a bag of mini cheddars for some salt. Supplemented with a couple of Shott blocks. I carry a few more bars but rarely eat them.
For evening food I go for Expedition Foods, quite pricy but unlike most lightweight meals, actually tastes good.
http://www.expeditionfoods.com/expedition-foods/freeze-dried/high-energy-se...
The chicken Tikka is particularly good!
We also have one of their apple-and-custard meals between us, overpriced and could be done yourself for less, but we're lazy.
Also some Bombay mix for when we get to camp.
Breakfast = porridge for my partner, I can't stomach the stuff so take muesli/dried milk.