Readybrek + milk powder. Or noodles. Packable and fast cooking on minimum water+fuel. If not, garages and pubs. : )
Best bodge-it dinner was my mate’s chilli noodles with salami (the French stuff that looks like a white dog turd) and dried apricots. Gourmet stuff, well impressed.
Spag bog sauce with pepperami and pasta with sachets of pepper taken from a pub stop?
6 eggs bought from a farm, cracked into a water bottle for later, and mixed in with noodles and sachets of brown sauce? Breafast (or dinner) of champions.
And those small bags of beef jerky can turn any packet noodle or soup into something a bit nicer. Always take a pack or 2 as bottom-of-bag rations.