peel and thinly slice potato and sweet potato. line pie dish with 2 sheets puff pastry. Star layering potato,then swweet potato and only one layer of bacon then sweet potato and potato.
mix 4 eggs add a large handful of cheese(any sort) to egg mix then pour over potato in dish.
cut off edged og pastry around pie dish and decorate centre of pie before placing in the oven for 1 hour or until golden. let sit after cooking for 20 minutes for excess moisture in egg to set correctly.