How about getting a food dehydrator? Iv got a westfelia 1 and its brilliant!
It cost about £35 and Iv used it loads to dehydrate different foods.
Just make your favorite foods but replace steak for mince, chicken for chicken mince etc and dehydrate it over night.
Another way of figuring out this whole camping food business is to work out the sort of things you eat at home and then figure out a way of doing it in the field, or finding substitutes in shops that are packaged in a way that doesnt need keeping chilled.
for instances, I like to eat a nice tuna pasta at home, sainsburys do nice foils packs of tuna, you can take dry pasta and an onion to fry, I like mayo and a bit of ketchup in it too which you can get little sachets from resturants etc and now you have found a way to have tuna pasta in the wilds.
Remeber you can do exactly the same cooking outside as you can in bar having an oven, but its already been said on this thread that there is a way round that.
Hope this Helps
Steve