Put the flour, oats and sugar in a bowl. Rub in the margarine and peanut butter finely. Slice the plums. Put them in a baking dish with the water. Cover with the crumble mixture. Bake at 375 F (180 C)/Gas Mark 5 for about half an hour until lightly browned on top. Source: The Single Vegan - by Leah Leneman Typed for you by Karen Mintzias