I did a trip one time when my butane stove was damaged before I got to the trailhead, so basically I was not cooking for six days. I had instant rice, and you really need to soak it a lot if you aren't going to simmer or boil. I also had home dehydrated red beans and garbanzo beans. They can be soaked and eaten, hopefully mixed with the soaked instant rice.
Quinoa has become my rice substitute. I cook it and then dehydrate it, so it is instant. It can be rehydrated with hot or cold water.
Veggies. You have to eat your vegetables. I buy a package of frozen chopped spinach and throw that on the dehydrator. There is some dry green stuff left from that, and I crumble it up into green powder. You can mix that into whatever you made with the rice and beans.
Hummus is powder made from dried chick peas. Just mix it with some water and some olive oil, and it goes down great with pita bread.