Prepare 4 pieces of aluminum foil and brush a little with the butter. Peel and cut the fruit into pieces and distribute over the 4 pieces of aluminum foil. Put the cinnamon, sugar and a little butter on the fruit and seal the foil to form a packet. Bake the parcels in the oven at 180 ° C for about 25 minutes, open for serving and place a scoop of vanilla ice cream on top of each.