Home-Cooked Treat Night

James shows how every night can be a treat night, with some simple home-cooked recipes that can turn a mundane meal into something special. He cooks a classic prawn cocktail, roast lamb with homemade mint jelly and luxurious vanilla-cured salmon. Food historian Gerard Baker reveals the history behind a traditional treat - the trifle - and there's a trip to the Dorset flour mill producing some of the region's award-winning organic flour.