What exactly is processed meat, and is a fresh British banger healthier than a frankfurter? Jimmy investigates dates. And Matt meets a man who has 250 varieties of apple on his tree.

Are crisp flavours made of real cheese and onion or cooked up in a lab? Matt investigates. Meanwhile, Kate learns the secrets of pepper, and Jimmy finds out about different types of yeast.

Why does marmalade taste bitter when it's made of sugar and oranges? Which fish are fully sustainable? And are the British public up for goat meat?

Jimmy joins the battle between the bell pepper and the Mediterranean fruit fly. Matt visits an amazing mobile leek factory. And how can you tell how much manuka is in your manuka honey?