The menu at Columbia is as dazzling as the entertainment and decor. But you really should order the Cuban sandwich, even as an extra for the table. Freshly baked Cuban bread, sweet ham, roast pork, perfectly melted Swiss cheese and tangy, crunchy pickles, all layered together, make for the best sandwich we've ever tasted. Jeff Houck, vice-president of marketing for the Columbia Restaurant Group, is so passionate about the dish, he's co-written a book about it, The Cuban Sandwich: A History in Layers. And it does have a layered history indeed...