Not a true pie.
May be called 'pie', but it's not really: "Wiki: A pie is a baked dish which is usually made of a pastry dough casing that contains a filling of various sweet or savoury ingredients. Sweet pies may be filled with fruit, nuts, brown sugar or sweetened vegetables. Savoury pies may be filled with meat, eggs and cheese or a mixture of meat and vegetables. This is what is commonly known as Cottage Pie (in this case with cheese)