Everybody is familiar with the classic shepherd's pie-a layered casserole dish made with meat on the bottom and mashed potatoes on top. shepherd's pie is a classic american comfort food-so tasty this version of shepherd's pie uses sweet potatoes instead of traditional white potatoes. sweet potatoes are actually healthier than regular potatoes, so this sweet potato shepherd's pie is quite a healthy choice use extra-lean ground turkey to lighten up the meat-turkey is delicious in a combination with vibrant orange sweet potato mash this is a one-dish recipe that makes a complete dinner-no.