At a railway station in eastern India, people queued to treat themselves with the city&rsquos best cup of tandoori chai. Nestled on a bench varnished in rosy cedar browns, I watched a middle-aged man bend to grind some dried flowers from a yellowing porcelain &lsquobotuko&rsquo (bowl in Nepalese) and add it to the amber coloured liquid in a cup. With an unguarded smile, Sang Tamang offered me some &lsquofloral chai&rsquo, with hints of with hibiscus, calendula, chamomile and rose petals.


