The Food Chain

Does food maintain its national identity once it's cooked abroad? We'll look at why a recipe by chef Jamie Oliver for Jollof rice has many West Africans talking about their culinary heritage. Also,can you patent a recipe? We look at the relationship between intellectual property and food, and whether our food is for sharing or protecting. And how Parmigiano Reggiano may play a part in holding up EU- US trade talks.