Nopalito's famous carnitas — pork braised in milk and beer with cinnamon — put them on the S.F. dining map, and those pleasantly tart, bright margaritas keep us coming back. On that note, there's good news and bad news for brunch-goers at the sustainable Mexican kitchen. The good: You can still eat carnitas at noon on a Saturday, along with almost every other dish or cocktail you love on the dinner menu. However, the restaurant offers few truly “brunchy” entrees.