Fill uncooked flan with mixture of mixed dried fruits (sultanas, raisins, currants, mixed peel, cherries). Just about cover with cream (good way to use leftover which needs using). Sprinkle with sugar, and optional coconut. I add a dusting of mixed spice before adding cream. Special occasions add chopped nuts and stir rum through the fruit before putting into the base. (Very rich - only need a sliver served). Then cook as usual or until slightly golden.
Source: Mantle of Safety Cookbook 2 (The Port Augusta Women's Air Branch Auxillary of the Royal Flying Doctor Service of Australia, c1987), p.121.