2 heads Cos lettuce, leaves separated and torn
1 garlic clove, peeled
陆 garlic clove, grated
陆 lemon, juice and zest
1 tsp Dijon mustard
4 anchovies in olive oil, drained, oil reserved
black pepper
1 tsp olive oil
2 tbsp extra-virgin olive oil
1 free-range egg yolk
1 tbsp finely grated parmesan cheese
25g/1oz Parmesan, finely grated
2-3 slices sourdough bread, depending on size