Family run Italian restaurants – you know, the kind of place where the tomato sauce is spicy, the pasta dishes are cheesy, the prices are affordable and the atmosphere is vaguely mobish – are hard to come by in San Francisco. But Il Borgo, nestled among much fancier fare in Hayes Valley, delivers warm, comforting and deeply satisfying Italian food cooked by Milan’s own Sergio Frigerio, whose recipes come straight from his mom. This is rustic cooking, and classics, like spaghetti carbonara and fettuccine Bolognese are done simply and traditionally, the way they’ve been prepared for years.