The document discusses the origin story of lengcha according to the novel Rupamanjari by Narayan Sanyal. It describes how a girl from Krishnanagar who married into the Burdwan royal family craved lengcha during her pregnancy. An artisan from Krishnanagar known for making lengcha and who walked with a limp was summoned and sent to Burdwan to settle there and make delicacies for the royalty, including lengcha. This is cited as the genesis for lengcha according to the novel.