A traditional english/irish dish, this is one of my families favorites. This is so good! My husband could eat the entire thing himself, it's so yummy, and has become our traditional christmas dinner. Don't let the kidney scare you off. It adds a depth of flavor to the beef and when chopped extra fine, you don't even notice it. If you can't find beef kidney, liver works well as a substitute or you can use mushrooms instead. For a prettier presentation, try putting the filling in individual sized ramekins and top off with the pastry.