Potato, Fish and Leek Salad

Perhaps smoked fish, such as haddock, is best for this warm salad, but I have made it with baby squid cooked in garlic, and also monkfish or little pieces of salmon seasoned with lemon juice. Lamb’s lettuce, also known as corn salad or mâche, can sometimes be bought, but I grow it in the garden (it seeds itself) and eat it as a salad during the winter months.