Uncle Ben's Natural Select parboiled flavoured rice is very tasty and easy. Just boil then simmer 10 min.
Lots of flavours to choose from
Minute rice is easier but tastes like crap with less nutrition.
Rice takes up little room, your best bet for carb to weight ratio and holds up well.
I vacuom seal 1 cup portions with a half cup of home dehydrated cooked chicken, 4 oxo envelopes and they are very weather and abuse proof. If it gets wet, no big deal just cook it within a few hours. I have one in my survival kit and top pocket of my pack always. Measure any amount and double the water mix, boil and simmer.
Quick soup. Add 4 to 5 parts water to 1 measure of mix
In a small billy or canteen cup: .25 cup mix to 1.25 water