Preheat the oven to 180C/350F/Gas 4. Grease a 30cmx25cm/12inx10in pie dish.
Line the pie dish with the ready-rolled pastry. Trim the edges and prick the base with a fork.
Heat the oil in a frying pan and fry the bacon for 2-3 minutes on each side, or until crisp. Set aside to cool a little, then chop into small pieces.
Meanwhile, fry the onion in the same pan used to cook the bacon for 2-3 minutes, or until softened.
Whisk the eggs and cream together in a bowl; stir in the bacon, onion and parsley. Season, with salt and freshly ground black pepper and pour the mixture into the pie dish. Sprinkle over the cheese and bake for 45-50 minutes, or until golden-brown on top.
Remove the pie from the oven and set aside to cool slightly.
Serve the pie with a green salad, chips and tomato ketchup.
Type the ingredients you want to use, then click Go. For better results you can use quotation marks around phrases (e.g. "chicken breast"). Alternatively you can search by chef, programme, cuisine, diet, or dish (e.g. Lasagne).