Christmas Plum Pudding with Fresh Orange, Walnuts, Ginger and Cloves

The original Christmas plum pudding, like mince pies, contained a substantial amount of meat. The meat was combined with prunes (the dried plums that gave the pudding its name), raisins, currants, spices and brown bread. The flour was a much later addition and I find that breadcrumbs and the absence of sugar make a far lighter pudding which is even popular with children (the fruit makes it sweet enough). Serve with brandy butter and cream or crème fraîche. If you want to make a round puddin