Contrary to the icon stenciled on the door, Irving Fields looks nothing like an iron Granny bent on reforming the eating habits of a decidedly pudgy nation. To look at his round, avuncular shape, one might not immediately guess that he has operated a health food restaurant in downtown Miami since 1971. But just watch him bustle around the restaurant and store. He's hawking vitamins, mixing strawberry-banana protein shakes, and ringing up the bill -- all the while maintaining a constant stream of banter and gossip directed at newcomers and regulars alike. The restaurant is only a short walk from the county courthouse and county hall, so many of the regulars are a mixed lot of Miami's most famous and notorious denizens. "Mayors, commissioners, judges, lawyers, and cops, I know 'em all," Fields declares. One of his favorite customers is former U.S. Attorney General Janet Reno, who he says confessed that she missed coming into the shop while she served out her term up in D.C. "She said, ?Irving, I've got to tell you I fantasized about your fresh fruit and yogurt,'" Fields recalls with evident pleasure. "Fantasized -- that's a strange word coming from her." Oh yes, about the actual food. The menu is large, with well-priced items ranging from tasty veggie burgers and spinach lasagna to chimichangas to a variety of chicken or fish dishes and a selection of salads and fresh juices. The restaurant operates on the downtown's bustle-and-bust cycle, Monday through Friday from 7:00 a.m. to 4:00 p.m.