My kids love sausage and mash. I always do it with at least one type of veg, preferably two. Peas, carrots, broccoli sort of thing.
We stayed with PIL a while ago and MIL did sausage and mash that was exactly that - sausage, mash, gravy. Then recently my DM did the same.
It won't do DC any harm but I thought it was odd. I don't think I'd ever give DC just meat + potato for dinner unless it was a desperate situation. AIBU to think it's weird to have a dinner with no veg?