1 1/3 cup oil
2/3 cup tarragon flavored vinegar (Heinz or Spice Island)
1 teaspoon salt
1/2 teaspoon garlic powder
1/4 cup sugar
1 teaspoon dry mustard
1/2 teaspoon pepper (white)
Mix ingredients together and refrigerate. Immediately before serving, add 1/2 cup Parmesan cheese and 1/4 cup sesame seed. Serve on lettuce with chopped water chestnuts.
NOTE:
I usually add the cheese and sesame seed directly to the salad, so as not to spoil the dressing for later use.