1. Preheat the oven to 350°F (180°C). To make croutons, cut the sliced bread into quarters. Transfer to a bowl and toss with the olive oil, salt, and pepper. Spread on a baking sheet. Bake for 10–15 minutes, or until crisp. Let cool.

2. To make the dressing, process the egg, lemon juice, mustard, Worcestershire sauce, anchovies, and garlic in a blender. With the machine running, drizzle in the oil. Transfer to a bowl and stir in the Parmesan. Season with salt and pepper. Stir in a little water if the dressing is too thick. Cover and refrigerate until serving.

3. Wash and dry the lettuce. Tear the lettuce into bite-sized pieces and place in a large bowl. Drizzle with the dressing and toss gently. Serve, topping each serving with the croutons and Parmesan shavings, if desired.