To make the dressing, place the mayonnaise, garlic, lemon juice, water, parmesan, salt and pepper in a bowl and stir to combine.
Toast the bread and the prosciutto in either grill or on the stovetop until crispy and golden brown. You can rub the toasted bread briefly with a sliced garlic for some extra flavor and drizzle with olive oil and sprinkle some seasalt on top.
Place the lettuce, egg, prosciutto, anchovies (if using) and parmesan in a plate and drizzle with the dressing. Serve the rest along side the salad