Creamy herb dressing

From the kitchen of a friend

1 tbsp dry mustard
1 tsp sugar
1/2 tsp dried tarragon leaves
1/4 cup boiling water
1/4 cup cider vinegar
1/4 cup dry white wine
1 cup olive oil

In blender, place mustard, sugar, tarragon, salt and pepper. Cover, remove center of cover, blend on high and pour water. Blend 30-60 seconds. Add vinegar and wine; blend 30 seconds more. With blender on high spread, slowly pour in oil. Blend 1 minute or until thick.

Cover and refrigerate until ready to use. Stir before serving.