Boil the potatoes. Start by first cooking the potatoes in boiling water for about 15 minutes or until fork tender. While the potatoes are cooking, you can prepare the meat mixture.
Prepare the meat mixture. Heat the oil in a large skillet over medium heat. Add the ground beef to the skillet, season it with the salt and pepper and cook it for about 5 minutes or until it's no longer pink, breaking it up as you go along.
Add Ingredients. Add the onion and garlic and cook for 3 more minutes until the onion softens and becomes translucent. Next, add the pepper flakes, Worcestershire sauce, onion soup mix, beef broth and stir. Stir in the frozen veggies and cook for a couple more minutes. Set aside.
Preheat oven. Preheat the oven 350°F.
Prepare the mashed potatoes. Drain the potatoes then add them to a large bowl. Add in the butter and using a potato masher, mash until smooth. Add the milk, Parmesan cheese, salt pepper and mash a bit a more until smooth.
Finish assembling the shepherd's pie. Spread the potatoes over the meat and smooth it out with a spoon. Take a fork and rough up the top a bit.
Bake. Place the skillet on a baking sheet, then transfer it to the oven and bake for 40 minutes until golden brown on top.
Garnish and serve. Garnish with parsley and serve warm.
Make sure you don't add too much salt as the onion soup mix already has plenty of sodium in it.
Shepherd's pie is easy enough to make, but you can simplify your life even further by buying some shortcuts. If you use frozen veggies, you're saving chopping time. Choose a bag of your favorite mixed vegetables from the freezer.
While you can use store bought mashed potatoes, homemade is always better, so focus your efforts on this. You can boil the potatoes while you're making the beef mixture. This way you'll end up with creamy and fluffy mashed potatoes.
Brown the beef in the same skillet you'll be serving from. This will ensure maximum flavor in your pie.
I used lean ground beef for this recipe, but you can leave out the oil if you are using ground beef with a higher fat content.
When adding the butter, I like to cut mine into pieces to make it easier to mash the potatoes.