Prepare crumbs by mixing the bread crumbs, butter and brown sugar with your fingers to form sweet crumbs.
In a baking bowl, place a small portion of the plums at the bottom. Place a layer of the apples on the plums. Cover with a portion of the prepared sweet crumbs. Again, make another layer by placing first the apples, then the plums and then the sweet crumbs.
Prepare layers of the apples, plums and the sweet crumbs till all the ingredients are used up. Bake in a pre heaeted oven for only 10-12 minutes. Cool and then keep in the fridge for 2-3 hours.
Serve cold. You could overturn the crumb if you wish.