When you say the word "enchiladas," chances are you're thinking about the saucy, cheesy affairs we've all come to know and love. But in Mexico City, you'll find a vast variety of enchiladas, both in the simplest of markets and nicest of restaurants. At the stately Mexico City restaurants El Cardenal and Roldan 37, Rick explores an interesting array of flavors, then makes show-stopping dishes of classic green chile enchiladas and red chile shrimp enchiladas.