Complex sentence: The pudding is composed of many dried fruits held together by egg and suet, sometimes moistened by treacle or molasses and flavoured with cinnamon, nutmeg, cloves, ginger, and other spices.
Split into simpler sentences: The pudding is composed of many dried fruits and is held together by egg and suet, sometimes moistened by treacle or molasses. Also, flavoured with cinnamon, nutmeg, cloves, ginger, and other spices.