Layered, Stuffed and Stacked

It's a feeding frenzy on this trip, as Guy Fieri first stops in to see an old buddy in Kansas City, Mo., who's got new spots and a secret menu of sandwiches that are not so secret anymore. Then, a grab-and-go taqueria is now three locations deep in Baltimore, and it's a familiar tune at a Greek joint in Cambridge, Mass., where they've got the moussaka market cornered.