- STEP 1
Heat the oven to 180C. Grease and flour a 9" pie dish. Rub oil over whole of the inside of the dish, bottom and sides. Roll out the pastry to fit then place in the tin. Flatten pastry into bottom and sides thoroughly. With excess pastry over the sides take a rolling pin and roll over the edge of the dish to get a lovely neat edge and remove the excess. Prick the bottom with a fork all over.
- STEP 2
Peel potatoes, chop into quarters and boil until just soft. Drain and allow to dry a bit.
- STEP 3
Slice the onions and add to a large mixing bowl. Add all the other ingredients and mix well. Add potatoes and mash into the mix with a knob of butter.
- STEP 4
Fill the pastry case and level out. Place in the oven for at least 40 mins check the bottom of the pie if the pastry is evenly golden it is ready. If not pop back in for 5 mins at a time and keep checking until done.