Decatur Street is home to some of the city’s finest tourist traps hawking New Orleans trinkets made in China or serving classic Creole fare reheated to order. Pockets of authenticity can be found here and there—freshly fried beignets from Café du Monde, a muffuletta from Central Grocery and a well-made sazerac at Tujague’s.  Tucked away in the back of Molly’s at the Market, a haven for locals in search of well-poured pints and stiff drinks, a new food venture brings cross-cultural influences ...