Dogpatch mainstay Serpentine gets new chef-owner in Tommy HalvorsonTommy Halvorson is the new chef-owner of Serpentine. Photo via Serpentine Serpentine in the Dogpatch neighborhood is quickly rolling toward its 10-year anniversary – not an easy feat in San Francisco these days. But with the new year comes new changes: Owner Erin Rooney is handing the business over to Tommy Halvorson, who has worked at the likes of Chez Panisse, Bix and Gary Danko and currently runs Foxtail Catering. Halvorson will be the head chef-owner while Rooney is expected to stay on as a silent partner. “Every five to 10 years, San Francisco restaurants need a breath of fresh air and some energy,” Halvorson said. “But