Dice apple in pieces and dump in a greased microwave bowl.
In another bowl, mix egg till fluff. Add sugar and mix again. Add flour.
Pour over the apples.
Put the lid of the bowl on it. Put in microwave for 10 minutes (this can be diffrent, my microwave is quite quick). Check the dough in between by poking in a toothpick. if it comes out clean the pie is done.