Using a medium size wooden salad bowl, mash and spread the anchovies and the garlic with a fork and rub the inside of the bowl with it. Adding the vinegar and mustard, blend thoroughly. Using the fork, add the olive oil and the coddled (meaning to cook in simmering water for 1 minute) egg yolk. Mix together and add the Worcestershire, lemon, pepper and parmesan cheese.
Makes: 4