I've done a reasonable amount of long distance backpacking and I've pretty much settled on the following as my rations of choice. This is carrying full kit (tent, fuel and stove, clothing suitable for a UK winter etc). Walking 20-30km a day. I've carried food for a week using this menu, which serves two:
Breakfast 1 sachet instant custard + 1 sachet instant porridge (just add water type) ideally with fruity bits for interest. Sounds a bit grim, but is a one pan hot tasty breakfast packed with energy. Tea/coffee.
Lunch is a mix of mini pitta bread, primula cheese spread with chives (squeezy tube), chorizzo, a cereal bar. Occasional handfuls throughout the day of peanut, raisin, chocolate peanut mix. Water.
Evening meal is pasta with a simple dehydrated packet soup like vegetable, minestrone or broccoli and cheese added for flavour. To add interest just before serving stir in a few slices of chorizzo or some shavings of a good hard cheese (one small piece can last a good while shaved frugally). (Excuse the mess in the tent, we weren't expecting you).
The pasta can get a bit samey, but the soups and chorizzo/cheese mix it up a little (If it's your birthday you could add both!) and it does provide a shedload of calories and again is a one pan meal.
Pudding is a sachet of instant hot chocolate (Just add water type) and maybe a wee dram.
If you are stupid like me and want to cook in your tent do the following: write will, buy stove, buy selection of fuels (if it's multi fuel), spend the weekend lighting, relighting, knocking, tipping, moving fuel bottle around and generally abusing the thing until you know what it's going to do before it does. I use parafin in my Optimus Nova as the stove uses so little it's amazing.
Finally a couple of piccies from ouside the tent as it was a very nice trip.
The tent is a Hilleberg Nallo 2 GT - best tent I've ever owned and I've had a few!
Scoops