My wife's wicked curried sausages with couscous.

Freeze the lot (in a freezer bag) or you can cook the couscous on the trail. Take whatever is frozen out of the freezer not long before you leave. Wrap it in paper towel and/or some aluminium foil. Bury it in your pack. Gently re-heat and enjoy as a tasty dinner. I can taste it now.

Once I took this meal to an overnight camp and it was 36C+ (that's 96F+) during the day and when I dug the meal out it was still frozen solid.

Well that's my suggestion.

Cheers,
Michael.