First prepare the dressing: chop up the garlic and the anchovies roughly and pound them into a paste in a mortar and pestle. You might need to add a little black pepper to grind it more easily. Add the rest of the ingredients, mix well and add enough water to have a spooning consistency.
Pick the chicken meat off the bone (make sure it’s at room temperature) and tear or cut into bite sized pieces.
Fry the bacon with a little butter until quite crispy. Remove from the pan with the slotted spoon, leaving the fat in. Add the rest of the butter, turn the heat up and toss in the bread cubes. Cook, turning and stirring, adding butter if necessary, until crisp and golden on all sides. Take off the heat, add the grated Parmesan and toss to coat the croutons. Drain on a paper towel.
Chop the lettuce and mix in a bowl (or individual serving bowls or plates) with a little of the dressing. Add the chicken pieces, sprinkle with bacon and Parmesan shavings, top with the croutons and serve with the extra dressing on the side.
