For the croutons, preheat the oven to 180°C/gas 4. Cut the crusts off the bread and tear the remainder into small pieces. Toss them in a bowl with the olive oil. Spread them on a baking tray and bake for 5–7 minutes or until crisp and golden. Remove and leave to cool. Then season lightly with salt. Meanwhile, put the eggs into a pan of boiling water and hard-boil for 8 minutes. Drain and cover with cold water. For the dressing, put the garlic, egg yolk, mustard, lemon juice, sugar and some seasoning into a small bowl. Mix together briefly with a hand-held electric whisk, then slowly whisk in the oil to make a smooth dressing. Discard the outside leaves of the lettuce if necessary and tear the rest into small pieces. Wash and dry well, then spread over the base of 6 medium serving plates. Peel the hard-boiled eggs and cut them into quarters. Arrange 4 pieces over each plate of lettuce leaves with the 4 strips of anchovy fillet and a few croutons. Drizzle 1 tablespoon of dressing over each plate and serve straight away.