Place the garlic and anchovies into a mortar, and grind into a fine paste with a pestle.
Add the capers, and mustard and continue grinding until a smooth paste is formed.
Use a spatula to scrape the paste out of the mortar, and place it in a mixing bowl.
Whisk in the lemon juice and Worcestershire sauce.
Place the egg in a large coffee mug, or other heat proof container.
Pour boiling water over the egg, and let sit for 3 minutes.
Drain the hot water off the egg, and cover with cold water.
Crack open the egg, discard the egg white, and whisk the coddled egg yolk into the mixing bowl with the other Caesar dressing ingredients.
Slowly whisk in the olive oil, until well blended. The dressing should have a consistency which is just a bit thicker than heavy cream.
Chop up the head of Romaine lettuce and add it to a large salad bowl.
Toss the lettuce with a bit of the Caesar salad dressing, then garnish with Parmesan cheese, freshly cracked black pepper and a few of the homemade croutons.
The salad should be well coated, but not drowning, with dressing.
Because of the raw egg that is used, any leftover dressing should be discarded.