Germanshepherdsmum
I wish OP would explain what it is that her husband cooks and whether it’s the same thing every day of the week or a particular meal on Monday, a particular meal on Tuesday etc. Perhaps if we understood exactly what the problem is we could be of more help. For instance I remember having lunch occasionally with an elderly bachelor client at his club years ago and he always had plain boiled potatoes and mince. Every time. The staff knew what he wanted. No other veg, no gravy …
Makes sense to me.
If we have to eat away from home, I always choose the same thing, if I can. Comfortable, easy, no problem thinking about my tummy.
Perhaps he has 'day' routines? Bit like Fish Friday?
It's merely food, maybe it only matters (to him) that he gets his daily total nutrients to subsist - eat to live not live to eat?