Plum and Pecan Crumble

There is absolutely nothing wrong with a plain crumble, but having given several suggestions for them in How to Eat, I reckoned it was better to offer you here the two crumbles I do most often when I’ve got people coming for dinner. This plum and pecan crumble (which can just as easily be made with walnuts) is comfortingly autumnal. If you want, use ordinary white sugar in place of the demerara; all