Make and chill the syrup first
12 minPut the sugar and water in a saucepan and bring to a boil, stirring. Once it starts boiling, stop stirring and boil for 8–10 more minutes. Add the lemon juice, then remove from the heat. Make the syrup before the pudding so it can cool completely: the pudding is sliced while hot and served with cold syrup. If both are hot, the pudding will fall apart.