When Copper Pot debuted in the Twin Cities  we were impressed by just how many dishes on the menu we'd never seen before Now two years later  the Copper Pot has tightened up its service and drink-mixing  added a buffet lunch (which really is most everyone's favorite way to eat Indian  right?) and continued to push the envelope with items such as blue crab in coconut milk with crisp papadums  traditional Tamil dishes like mutton kuzhambu  and Tellicherry pepper-crusted duck cooked in a clay oven