And I can’t believe one of my correspondents hit the bull’s-eye when she Tweeted: “Last week: Feedlot beef This week: hothouse tomatoes Next week: Joys of iceberg?” It really is way past time to retire the notion that there is anything fresh to say about the most industrial green in the supermarket. Margaret Visser exhausted the topic in 1986, for Kroger’s sake. Beyond that, the cluelessness in this latest condescending ode was pretty impressive. Anyone shocked by $12 mesclun from far away has not spent the winter resisting the temptation of $20- to 48-a-pound stuff at . . . the Greenmarket. And, just FYI, the smart money is on margarine next.