We're still in the dried food era
Like Apollo, add water to "instant" meals. The dried food keeps for a long period and has minimal weight. Potable water can be added as required - if one particular dried meal is unpopular, its water content is neither lifted to space nor wasted if it goes past its shelf life.
Refrigeration is not needed.
The diet sucks, but that's what spacemen and women have to live with in the present era...