So you need a spirulina fix and don't have lots of time? If you're anywhere near North Miami Beach you'll be well advised to zip over to the fastest little health-food place in town. Okay, so the menu also offers gyros and French fries. Don't worry. You'll find a large variety of smoothies, fresh-pressed vegetable juices, and vegetarian entrées. For thirteen years this roadside stand has been attracting healthy eaters with its ramshackle charm and laid-back atmosphere. If you crave something with a kick, be sure to order Amos's famous "roots tonic," a chilled brew described by one waitress as tasting "like living hell." Despite a bouquet reminiscent of gasoline (and with a similar burn), this mighty elixir -- made on the premises with a combination of roots and barks and served in a shot glass -- will kick you into high gear and launch you back on the highway of life bursting with energy.