Drooling over meat-dripping sandwiches or hot dogs of saturated fat doesn't seem like the civilized thing to do when you're traveling by foot through Miami's urban jungle. Oh, there are plenty of portable grease pits along the way, tempting even the most health-conscious of souls. Real health hazards. But just think of them as obstacles in your journey. What you want is a vegetable patty of mushrooms, brown rice, and cheese wrapped in pita bread with added alfalfa sprouts (a wondrous tonic), carrots (rich in vitamin A), romaine lettuce (a good source of protein), and cherry tomatoes (bursting with vitamin C). That veggie burger and many more natural treats await your arrival at Orange Carrot. Perhaps a bit out of the way from the Bayfront shopping circuit but definitely within walking distance. And remember, walking is a good complement to a veggie burger, much better than that extra cheese.