Ingredients
Equipment
Method
- Preheat oven to 375°F (190°C).
- In a large skillet or Dutch oven, heat olive oil over medium heat. Add onion, carrots, and celery and cook until softened, about 5-7 minutes.
- Add garlic, thyme, and rosemary and cook for another minute until fragrant.
- Sprinkle flour over the vegetables and cook for 1-2 minutes, stirring constantly, to create a roux.
- Gradually whisk in beef broth and leftover gravy (or pan sauce), scraping up any browned bits from the bottom of the pan.
- Stir in Worcestershire sauce and tomato paste. Bring to a simmer and cook until slightly thickened, about 5 minutes.
- Stir in shredded pot roast and frozen peas and carrots. Season with salt and pepper to taste.
- Pour the filling into a 9x13 inch baking dish.
- While the filling is simmering, prepare the mashed potatoes. In a large bowl, mash the cooked potatoes with a potato masher or ricer until smooth.
- Gradually add warmed milk or cream and softened butter, mixing until light and fluffy.
- Stir in Parmesan cheese (if using) and season with salt and pepper to taste.
- Spread the mashed potato topping evenly over the pot roast filling.
- Use a fork to create ridges in the mashed potatoes for better browning.
- Bake in the preheated oven for 20-25 minutes, or until the mashed potatoes are golden brown and the filling is bubbly.
- Let the shepherd's pie rest for 5-10 minutes before serving.
Notes
For a richer flavor, brown the butter before adding it to the mashed potatoes. Use a combination of russet and Yukon gold potatoes for a balanced texture. Leftover Rosemary Garlic Mashed Potatoes also make a great topping. The assembled shepherd's pie can be refrigerated for up to 24 hours before baking. Add other herbs and spices to customize the flavor.
