"Oh. Wow." Ted just sort of opened his mouth and the 'wow' came out. After his ears registered that he had gone and said something that he wanted to keep to himself, he figured he should try and make it seem like the wow was about the food and not about grown up Hawkeye.
Because she was Hawkeye. Teenage girl. Who didn't look like a teenage girl, and if he had seen her on the street and not known he might have looked and - argh! This age swap business was so not cool!
"Pizza, awesome!" He added just to try and steer things back onto some sort of track. "So how are things? You know I was working on some arrows before this whole - thing. So I can pass over what I've got if you want." Not that he thought she just showed up looking for arrows, but he was trying to act like this was normal Hawkeye coming over for a visit times.