Crumpets, Baby Food, Mascarpone

Kate Quilton challenges Matt Tebbutt to make crumpets, and finds out how they get filled with unique holes. Jimmy Doherty looks into the unusually long shelf-life of baby food, and is introduced to a brand new machine that preserves food by using pressure instead of heat. And, in Italy, Matt finds out why mascarpone is more expensive than other soft cheeses.