Simply add the ingredients listed below to 1 cup of mayonnaise and blend in a processor until smooth and tasty. In sauces like this htere is really no need for quantities; I have put them here as a guide but let your taste buds guide you. Remember that commercial mayonnaise is already well seasoned, so don't add salt or pepper until the very end.
The classic Harry's Bar condiment, you have to have this sauce in your repetoire.
2-3 teaspoons Worcestershire sauce
1 teaspoon Dijon mustard
splash of brandy
3 tablespoons milk
salt and white pepper
Mix the Worcestershire sauce, lemon juice, mustard, brandy, and mayonnaise. Add just enough milk to adjust the thickness so that it just coats the back of a spoon. Season to taste.