An easy comfort food, this Shepherd's Pie recipe is a delicious potato-topped ground lamb or beef casserole. Which is steeped in a flavorful sauce with vegetables that will bring to mind the beauty of Ireland.
For Mashed Potatoes: Boil the potatoes in a large saucepan. While the potatoes are cooking begin with the filling.
For Shepherd's Pie Filling: Melt butter in a large skillet over medium heat and add onion and chopped carrots. Continue to cook until the onion becomes translucent and the carrots soften. Add garlic and cook another minute. Then add the frozen peas and corn, stirring to incorporate.
To the vegetables add the ground lamb or beef and cook until no longer pink. Then add the tomato paste, broth, thyme, salt, pepper, and 1 tablespoon fresh chopped Italian parsley. Bring the filling to a boil, then reduce heat to a low simmer and cook for 10 minutes. Add additional broth if necessary.
Meanwhile, prepare the mashed potato topping. When the potatoes are fork-tender, about 20 minutes, drain. Add 3 tablespoons of butter to the potatoes. Using a potato masher, mash until smooth. Add milk, Parmesan cheese and salt, and freshly cracked pepper to taste. Stir and mash until smooth.
When the meat filling has thickened, transfer to a lightly greased 3-quart baking dish or deep-dish pie plate. Spoon mashed potato topping evenly over the meat mixture, smoothing with the back of a spoon. To give the topping a pretty tough — score the mashed potato in a diamond pattern with the top of a fork.
Bake for 25 to 30 minutes or until the potatoes have begun to brown and the filling is bubbling. Let cool 5 minutes before serving. Garnish with fresh parsley and serve.