Make duplicate meals when you do cook. Things you can freeze, thaw and heat for later. I live alone but make soup, pasta dishes etc for 6-8, just like when the kids were home. THEN I put it in ziplock freezer bags, push the air out and lay flat on a jellyroll pan. I just stand them up in a box in my garage freezer. I don't cook on Sunday's so I always have great food to eat. Trust me, you'll save a ton of time and frankly, I doubt he'll notice. AND there are those make ahead crockpot meals that you make ahead and freeze. Here's one site you might look at.
https://newleafwellness.biz/2015/08/...ack-to-school/