Sorry to take so long to get back to this - even keeping up with MN is hard for me at times!
Maybe it would help if I answered some questions:
Why is it that it's your responsibility to provide food for him?
Because I like food, and I like cooking, and he hates both. Not completely my responsibility, in that if I was doing everything reasonably, and he still didn't eat, that's not my circus anymore. I came here asking if I was U, and especially as I've tried to think about what I've left him to eat, instead of just how much, I've found I wasn't doing a particularly good job of leaving behind food -- many people would balk at eating the same thing dinner, lunch, dinner, and lunch, and especially if something else was sitting there, choose that instead.
Everything was working fine until I couldn't eat dinner, and we suddenly had a lot more leftovers, of which I just thought, great, he can eat more of them, without thinking beyond just counting. The pattern had a long history of developing, in that we started making and leaving behind left-overs when he kept trying ready meals and discovering they were simply all making him ill. So it was a nice, cheap way to provide a safe ready meal-like option. He used to chip in the cooking more pre-DD, chopping what I gave him, etc., but now he's exhausted after a day looking after her so only does very few things, like grating cheese. But that I don't mind, as I do enjoy the cooking process.
Several things we divide responsibility for, and this is one of the more no-brainers: I love it, he hates it. The fact that he makes phone calls when he just hates it whereas I have full-on phobia is a much trickier division. Someone could just as easily ask him why he drives me everywhere, can't you just tell her to woman-up and get a driving license? But he sort of likes driving, and I hate it. (Although I'm actually really hoping to get a license this year! Just giving up on the manual and going for automatic; I'd like to be able to drive in an emergency, and we have an automatic car now).
What does he do to look after you now that you have health issues too?
He often will look after DD on a weekend to let me sleep a few hours - and given that he's done that all week, and I tend to sleep a good 3-4 hrs at a time, that is not a small ask (especially as it cuts into his potential work time). I try not take advantage of this so much, but sometimes I really need it, and he always says yes.
As previously mentioned, he drives me everywhere, including my many health tests. He has also done things like notice it is raining heavily outside and calling me at work to ask if I'd like him to pick me and DD up so we won't get wet walking to the bus -- whereas he would have otherwise had another good 1.5 hours to himself to rest or work.
And back when I was pregnant and heavily impacted by SPD (eventually couldn't walk), he both drove me everywhere and carried my bags into work for me (and at the end, would meet me at the door to the office area with my office chair and roll me all the way to my desk). Once he even wrote things up for me for a presentation as I couldn't stand.
So he does what he can within his abilities. I don't think it's reasonable to suddenly drop our 'I do the food' arrangement just because he doesn't want to eat the same thing many times in a row.
And, an update, after nearly 3 weeks of whiteboard:
Going well! I completely geeked-out and made a fancy spreadsheet that lets me plan a month at a time while keeping track of leftovers (and learned a lot about excel functions in the process). I found that I was overestimating how much I had to cook, as I'd forget entire meals and their leftovers when trying to keep it in my head.
DH seems quite happy to check the board for his planned meal, and the system is flexible enough that he can swap one for another if necessary (like when DD fell asleep before they were scheduled to share a dinner together, he warmed up the next day's lunch instead, which I was planning to make DD a side plate for as she didn't like that meal so much).
Still tricky to avoid leaving monotonous strings, but that just reinforces what had been happening without the planning. No food has gone to waste since we started, which was my main goal.