When Nancy Silverton began serving sandwiches one night a week at Campanile, her and husband Mark Peel's award-winning restaurant, she envisioned a laid-back and intimate evening when she'd be able to relax, chat with customers, and have some fun devising new and creative recipes. Well, she hasn't had much time to relax: Sandwich Night became one of Campanile's busiest nights, a vastly popular weekly tradition in Los Angeles and the place to be on...