D.K.
I don't know of any specifically and intentionally fortified foods (mostly because I never noticed I guess), but how does she feel about scrambled eggs? A little butter on them and most kids will gobble them down. Also, kids that don't like most dairy usually still like string cheese which is full of protein. Peanut butter is also a fantastic source as well as good hot dogs (like Hebrew National) just heat slightly and hand it over, lunch meats (which again, most kids will eat even if they don't like meat in general) etc.. These are kid friendly versions of the protein rich foods grown-ups eat.