One of my policies when hiking is to never “cook” food. All the warm food I take should be able to be cooked using only boiling water in a bowl. This means never cleaning pots with burnt on food pieces. So far this has worked well for me.
Last year I got an Excaliber Dehydrator for my birthday and I have made a range of dehydrated meals. Earlier this week I took dehydrated rice and mince to work and rehydrated it by poring boiling water over it and letting it stand in a warm box for an hour. While more sauce would have been nice the taste was great and there were no crunchy bits.