There have been a large number of startups that offer nutritionally complete food, like Soylent and Huel. All of them, as far as I know, offer it mainly in powdered form. You have to mix it with water, and shake it, giving you a 'nutrient drink'.
However, all this mixing is very annoying to me.
Why do they offer powdered versions only, instead of the kind of bars that astronauts eat?
Huel offers this bar version, but its small, and only intended as a side snack.
Are there any other companies that offer nutrtionally complete food in hard-form rather than powdered-form, that can be used as a primary meal replacement?