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Easy Shepherd's Pie with Leftover Pot Roast

Comfort food for a cold, rainy day - this shepherd's pie is made with leftover pot roast and plenty of mashed potatoes for an easy dinner the whole family will love.
Course Casserole, Main Dish - Beef
Cuisine Great Britain/Ireland
Keyword comfort food, fall favorites, family dinner, leftover beef
Prep Time 20 minutes
Cook Time 40 minutes
Total Time 1 hour
Servings 8
Calories 530kcal


  • 1 1/2 pounds cooked beef leftover pot roast works well shredded and then chopped coarsely
  • 2 cups carrots cooked
  • 2 cups green beans cooked
  • 1/4 cup butter
  • 2 cups whole milk
  • 1/3 cup flour
  • salt and pepper to taste
  • 2 1/2 pounds potatoes (about 3 to 4 large potatoes)
  • 3/4 cup whole milk
  • 1/4 cup butter
  • 1 cup shredded Cheddar


  • Preheat the oven to 375°.
  • Grease a baking dish and add the leftover cooked beef in an even layer.
  • Cover with a layer of the carrots, then the green beans.
  • Set aside.
  • Melt the 1/4 cup butter in a heavy frying pan.
  • Whisk in the flour and cook, stirring constantly until it is a golden color, about 2 minutes.
  • Whisk in the milk and simmer, stirring often, until the gravy is smooth and thick.
  • Pour over the meat and vegetables.
  • Set aside.
  • Peel and cut the potatoes into chunks.
  • Boil them in salted water until they are very tender.
  • Mash them with a potato masher or use a mixer, adding in the 3/4 cup milk and 1/4 cup butter.
  • Season to taste with salt and pepper.
  • Spoon over the meat and vegetables and sprinkle the cheddar over the top.
  • Bake for 30 to 40 minutes or until the cheese it bubbly and the dish is heated all the way through.



  • Jarred, prepared gravy is a great timesaver if  you are in a rush.
  • Save time by using prepared mashed potatoes from the store. Costco has some that are really good.
  • Cooked ground beef can be used in place of the leftover roast beef - You'll need about 3 cups.
  • Cooked, boneless chicken can be substituted for the beef.
  • Pulled pork is a delicious variation to this recipe. I like to substitute corn for the carrots, and use BBQ sauce over the meat instead of gravy when using the pulled pork.
  • Shepherd's Pie can be assembled up to 2 days ahead of time - keep covered in the refrigerator until you are ready to bake it.
  • Chopped onions can be sauteed until tender in some butter and added over the meat layer.
  • Want to save some calories and carbs? Use mashed cauliflower in place of the potatoes.
  • You may add peas instead of green beans - or along with the green beans if you like


Calories: 530kcal | Carbohydrates: 31g | Protein: 32g | Fat: 31g | Saturated Fat: 16g | Cholesterol: 127mg | Sodium: 330mg | Potassium: 1173mg | Fiber: 5g | Sugar: 7g | Vitamin A: 6170IU | Vitamin C: 21.4mg | Calcium: 280mg | Iron: 7.6mg