Check out Soylent as a convenient way to take nutrition.
I know having something tasty at the end of the day is an enjoyable part of bushwalking, but that doesnt mean something like Soylent might not have its place too.
A quick lunch whilst on the move...or simply being able to head off on short notice and take x number of days food without needing to plan meals.
Something like this must already exist Im sure.......
The guys website is here.
.