NYT Cooking: Here is a nod both to the original bananas Foster at Brennan’s restaurant in the French Quarter of New Orleans and to the luxe version of bananas baba au rhum that the Louisiana chef Allison Vines-Rushing once cooked at Jack’s Luxury Oyster Bar in the East Village. Silky and rich, deep with the flavors of bananas, rum and custard, it is not much work to make, and pays off in incredible flavor. ...