PADMA Lakshmi may finally be over Salman Rushdie. Lakshmi, who took billion-heir Adam Dell as her date to the South Beach Wine & Food Festival, ran into her ex-husband Tuesday at the Cinema Society screening of “Sleepwalking.” “They were seated about six feet apart, and there seemed to be uncomfortable silence for a while,” said our spy. “Salman came up and shook her hand, but she seemed to be more into Skeet Ulrich.” Meanwhile, the film’s star, Charlize Theron, revealed she’s a huge fan of “Top Chef,” which Lakshmi hosts, and did a spot-on impersonation of Lakshmi at the Soho Grand after-party. Theron dazzled in Dior, but the dress was a last-minute replacement after her luggage was lost en route to Chicago for an Oprah taping.