Who said a pie needs to be sweet? Enjoy this savory pie made of meat and vegetables with a crust of delicious mashed potatoes Traditionally made with lamb, we're using ground sirloin instead, although you can definitely make this recipe with lamb, if you prefer. This dish is also a great way to use up left over beef roasts. Just cut up the hunks of cooked beef into small pieces and use that meat instead of ground sirloin. The possibilities for this dish are almost limitless-we'd love to hear how you tweak our shepherd's pie recipe to make it your own. Let us know in the comments below