Couscous is pretty good campfood, you just need to add hot water so you save on fuel, it cooks in its own heat. Add some dried mushroom, onion, garlic and sundried toms although these need soaking to rehydrate and the toms need water changes to soak out exessive saltiness; and herbs/spices or add anything else you can think of of course.
A famous ***** with a fork does a range of easy to use sachets....
http://smokinggunpr.co.uk/wp-content/uploads/Ainsley-sausage.jpg
And you can pick up cheaper ones at the likes of Aldi/Lidl etc for as little as 30p a go, two or three would do a good feed.
Quinoa is good field protien but needs to simmer for 20 mins (or just chuck it into a thermos for 30-40 mins or so, this method works for many things that need to boil/simmer- rice, pasta, eggs, the basic rule of thumb I work on is just under twice your usual simmer time; wide mouthed thermos is best as I found out the first time I used this method for boiled eggs
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I am not affiliated with the ***** with the fork, any supermarket, not grain or flask promoters.