In this episode we discover the story behind the sweet, crisp, crunch of the salad leaves. From iceberg to Lollo Rosso, from radicchio to endive, the choice of salad ingredients is extensive. The flavours are equally varied from peppery to pea flavoured and plenty in between. We discover the story of the Frenchman who spent his days dressing the salads of London’s High Society in the 1800s and we explore the subterranean growing techniques that could revolutionise the way leaves are cultivated in the future.