Ingredients
Equipment
Method
1. Make the Meat Filling:
- a. Add the oil to a large skillet and place it over medium-high heat for 2 minutes. Add the onions. Cook 5 minutes, stirring occasionally.
- b. Add the ground beef (or ground lamb) to the skillet and break it apart with a wooden spoon. Add the parsley, rosemary, thyme, 1/2 tsp salt, and 1/2 tsp pepper. Stir well. Cook for 6-8 minutes, until the meat is browned, stirring occasionally.
- c. Add the Worcestershire sauce and garlic. Stir to combine. Cook for 1 minute.
- d. Add the flour and tomato paste. Stir until well incorporated and no clumps of tomato paste remain.
- e. Add the broth, frozen peas and carrots, and frozen corn. Bring the liquid to a boil then reduce to simmer. Simmer for 5 minutes, stirring occasionally, until the gravy is thick.
- f. Set the meat mixture aside. Preheat oven to 400°F (200°C).
2. Make the Potato Topping:
- a. Place the potatoes in a large pot. Cover the potatoes with water. Bring the water to a boil. Reduce to a simmer. Cook until potatoes are fork-tender, 10-15 minutes.
- b. Drain the potatoes in a colander. Return the potatoes to the hot pot. Let the potatoes rest in the hot pot for 1 minute to evaporate any remaining liquid.
- c. Add butter, half & half, garlic powder, 1/2 tsp salt, and 1/4 tsp pepper. Mash the potatoes and stir until all the ingredients are mixed together.
- d. Add the Parmesan cheese to the potatoes. Stir until well combined.
3. Assemble and Bake the Casserole:
- a. Pour the meat mixture into a 9x9 (or 7x11) inch baking dish. Spread it out into an even layer.
- b. Spoon the mashed potatoes on top of the meat. Carefully spread into an even layer.
- c. If the baking dish looks very full, place it on a rimmed baking sheet so that the filling doesn’t bubble over into your oven.
- d. Bake uncovered for 25-30 minutes, or until the meat is bubbling and the potatoes are golden.
- e. Cool for 15 minutes before serving.
Notes
- Vegetable Substitution: If you can’t find frozen mixed peas and carrots, you could use ½ cup frozen peas and ½ cup frozen sliced carrots.
- Meat Choice: Traditional Irish Shepherd’s Pie uses ground lamb. Cottage Pie typically uses ground beef. This recipe works well with either.
- Oven Preheating: Start preheating the oven to 400°F (200°C) after you make the meat mixture (listed in instruction step 1f).
- Make-Ahead: Assemble the casserole (without baking), cover, and refrigerate for up to 3 days. Let it sit at room temperature for about 20 minutes before baking.
- Freezing: The assembled pie (baked or unbaked) can be tightly wrapped and frozen for up to 2 months. Thaw overnight in the refrigerator before baking or reheating.