Nigel Slater: Eating Together episode 1 - Dumplings - Nigel takes a tour of the diversity in modern British home cooking, starting with bite-sized gems from around the world that make a big impression.     From his classic suet dumplings that say old-fashioned Britain, his travels take him to Lincolnshire to meet Nita, whose recipes for pea kachori and lamb samosas have a profound personal significance. He meets Rafael from Poland to learn the art of making pierogi, and…