Soak the oats and coconut flakes in hot water until they swell and absorb all the liquid. If they are still hard, add a little more water.
In an appropriate tray, place part of the mixture with biscuits and oats as a base layer, pressing it well. Apply the cream on top. Make a second layer of oats and cream again.
Between the layers, place sliced or whole soft fruits of your choice. Top with fruit and sprinkle with 2 tablespoons of coconut flakes. Put the cake for 3 hours in the refrigerator before serving.