Heather's, 74 McMillan St, London SE8, 0181 691 6665
If you want to repent for a Christmas overstuffed with turkey, chipolatas and pork pie off the bone, then stagger down to Heather's in south-east London. This vegetarian and vegan restaurant is Deptford's second-greatest secret (the greatest, of course, being the identity of Christopher Marlowe's killer). Twelve quid gets you unlimited access to their sumptuous buffet, which creaks with African peanut soup, caramelised onions and nutty chocolate pudding. Open for lunch (not Sat) and dinner (not Mon or Sun).