SAN FRANCISCO – On a break from the front lines, nurse practitioner Gabe Westhemier tucked into a plate of duck confit, the work of one of the city's celebrity chefs. ("It was wonderful.") Meanwhile, at another San Francisco emergency room, nurse Liz Sanderson still savors a sea salt caramel bread pudding from another posh eatery. ("It was possibly the best thing I have ever eaten.") The best of foods is being sampled in the worst of times by the most besieged of heroes -- all thanks to a group of San Francisco friends who had the idea of helping both local restaurants that need customers, and health care workers who need nourishment during their long, stressful shifts.