Yes but he is married, he's married to someone who is at home for as many hours a day as she wants or needs to be, unlike him. he goes If they both worked then of course I would not be saying that, but he does, she doesn't, and there is only one six month old child - not a house of marauding toddlers a school run to do, and a small home business to run FFS. This is nothing to do with gender roles or being stuck in the 50's it's about a fair and even distribution of the practical chores. I couldn't give a stuff whether it's the man or the woman who cooks or looks after the baby or whether neither of them look after their own child, pay someone else and live on M&S ready meals 7 days a week.
The fact is, the OP is able to prep something to eat at some point in the day, she's able to get it in the oven without having to dash in after a commute and immediately start slaving over the stove. Her DH isn't.
All this 'little man takes up my whole day' nonsense, well yes, they will do that, if you let them, a bit like MN really
but are we seriously to believe that looking after one baby is so demanding that you can't be expected to do knock up a bit of dinner as well? In between sitting in Starbucks with a baby on my knee, chatting to all my mummy mates, or going to Musical Baby Einsteins or whatever, and watching a bit of shit daytime telly? 
Because I'll tell you what, if that's the case, I must have been some fucking kind of superwoman. Go me.