What about practice? They certainly make you feel at home at Chutney Mary. Within minutes, we were into a detailed conversation with the assistant manager, touching on Vasco da Gama, Indian coastal trading stations and edible metals - rarely has a food order (for crab cakes and Cochin-style squid, followed by Lucknow lamb with the "jewel of gravies" and exquisitely stuffed guinea-fowl korma) been so lengthily examined, disputed and reasoned.