If you come across a wintry scene on the beach in Southampton over the weekend, that’s Sandra Lee doing a holiday-themed shoot for her lifestyle magazine. The domestic diva and first girlfriend of Gov. Andrew Cuomo is setting up on Dune Beach for the shoot. A source told us, “The concept is a ‘winter wonderland’ — lots of white on white, big pompoms for snow effect, an edible snow-globe cake as a centerpiece, an ice-block sculpture and a white snowman.” We are also told that Lee, who is spending the summer in the Hamptons with Cuomo, has recently signed a deal with arts- and-crafts company Michaels, which also sells Martha Stewart Crafts.