If pearl tapioca is used, soak it for 4 or 5 hours and then drain off all the water. Minute tapioca will need no soaking. Add the tapioca to the boiling water and salt.
Cook in a double boiler until the tapioca is entirely transparent.
Peel and core the apples. Place them in a buttered baking dish, fill each cavity with sugar and cinnamon, and place a piece of butter on top of each.
Pour the hot tapioca over these, place in a hot oven, and bake until the apples are soft.
Serve either hot or cold with sugar and cream.