Specifically, from VT, I've adapted the following (basically I simply
 eliminated the oil they listed):
  Garlicky Caesar Dressing
 4 - 5 cloves mashed fresh garlic
 1 tsp. good red wine vinegar
 2 tsp balsamic vinegar
 1 Tbls. lemon (preferbly fresh)
 1 tsp. water
 1/2 tsp. dry mustard
 1-2 drops hot pepper sauce
 Mix or blend all ingredients together.
 When I eat out, I always order their lowfat  salad dressing on the
 side  and either vinegar or lemon.  Then I mix about 1-2 tsp of the
 lowfat dressing with the straight vinegar or lemon.  This adds lots of
 flavor and additional “cling” with just a little bit of fat.