Right off of the Blue Line's Damen Stop is the wonderful Flash Taco. Whenever I am coming home from O'Hare after a trip, I usually get off the train just to stop at Flash, and now they finally deliver, in conjunction with UnderDog, which is also good, I am just not much of a hotdog fan, so I go to Flash much more often. They are not the most authentic, real mexican or so they say, offering the lettuce and tomatoes and cheese, instead of just onions and cilantro, like the authentic joints. But whatever, I really like lettuce, tomatoes, and cheese. And they are open late, which is so nice.