"Masterpiece! Masterpiece" sings the waitress at the Owl Bar as she carries a green chile cheeseburger from the kitchen to my place at the bar. It is 8:30am, and while the menu does have a couple of egg-and-bacon breakfasts as well as a few steaks and sandwiches, the unique New Mexico hamburger is what has put this out-of-the-way watering hole on the good eats map. Since at least the early days of atomic bomb tests at nearby White Sands, when scientists used to come here for an explosive meal, The Owl Bar has built such an exalted a reputation that aficionados drive from Texas and Colorado to eat 'em two by two. It is so popular at lunch in the summertime, you may have to wait for a place to sit.