I really like how Severus had 'hidden' himself away, Teddy's extreme reaction to his parentage and Harry's reaction to it all. I love the image of Harry and Severus working peaceably together in the kitchen for some reason, even through all of the life recounting.
Severus' food sounds just amazing and was making my mouth water.
I think the story was pitched perfectly, with just the right amount of information, but I'd love to know more at some point - about everything to do with Teddy and James etc. Great fic.