Those of you of a certain age, lovers of Jackie Kennedy and caviar will remember Jackie’s caviar diet. Said to watch her weight “with the rigor of a diamond merchant counting his carats,” she was known for eating a meal a day – a single baked potato stuffed with Beluga Caviar and sour cream. All this came to mind as I went to check out the new jewel of a lunch and dinner spot, Caviar Russe Miami at the Four Seasons, 1441 Brickell Avenue (T.305-902-6969) and found an outstanding prix fixe lunch, what they call the New NY Power Lunch.