I do prefer a shepherd’s pie to have minced beef as well as lamb, hence the combined names in the title. This family-style meal can be tweaked and changed to your taste but this is how my family prefer it!
In a large frying pan, heat the olive oil, then sauté the onions and carrots over a medium heat until softened. Add the beef and lamb mince and cook until browned, breaking the meat down with the back of a spoon. Add the tomato purée and cook, stirring for a few minutes.
In a separate pan, heat a knob of butter until foaming and add the mushrooms. Cook for a fe