Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
1/4       c             Red wine vinegar
1         ts            Fresh lemon juice -- (OR up to double amount)
1/2       ts            Dry mustard
1/2       ts            Soy sauce
1/2       ts            Freshly grated horseradish
-- (or prepared)
1                      Garlic clove; minced
2         ts -to
3         ts            Fresh herbs *
1/2       c             Olive oil

Preparation:

* Fresh herbs mix should be equal parts basil, dill, parsley and chervil.

Place all ingredients in a jar. Cover and shake jar vigorously until mixed.