Just--ick. Pack or purchase in the airport if you can. On one of our flight legs I was counting on the pizza for the kids, and the FA refused to sell it to me, she said it was inedible that day. Yes, do check out the menu; I had a really, really hard time finding something for my kids to eat. The sandwiches were ok for me, but I ended up picking off most of the condiments/extras for the kids. We got sandwiches from Tim's as we went through the airport and enjoyed them at leisure once we were settled.
Oh my gosh, assuming you can take food...I'd forgotten about the new restrictions, though I think food is ok now. (I haven't flown since July.)