New Amsterdam Public’s Jill Slater and Robert LaValva have organized a one-day test run of a public market at the old Fulton Fish space. Called the Wintermarket, the event is part of the non-profit group’s proposal to create a dedicated market in the Seaport space, which these days makes so much sense that it almost hurts, what with everyone talking about grass-fed this and raw milk that. The concept of sustainable food has no value......