Delicious Leftover Prime Rib With Mushrooms And Mashed Potatoes Recipe

I love the feeling of having a delicious, home-cooked meal ready to enjoy after a long day. That’s why I’m always trying to find new ways to make the most of leftovers, like this delicious leftover prime rib recipe. It uses up every last bit of prime rib I have left over and turns it into an amazing meal of mushrooms and mashed potatoes. I guarantee you won’t be disappointed when you try it!

Leftover Prime Rib with Mushrooms and Mashed Potatoes Recipe

Prep Time

35 mins

Total Time

70 mins


5 servings

Leftover Prime Rib with Mushrooms and Mashed Potatoes


  • • 2-3 lbs of leftover prime rib
  • • 10-12 ounces of mushrooms, sliced
  • • 2 tablespoons of olive oil
  • • ¼ cup of butter
  • • 2-3 cloves of garlic, minced
  • • 2 tablespoons of fresh thyme, chopped
  • • Salt and pepper to taste
  • • 5-6 potatoes, peeled and diced
  • • ½ cup of milk
  • • 2 tablespoons of butter
  • • ¼ teaspoon of nutmeg
  • • ¼ cup of fresh parsley, chopped


  • Hey everyone, I’m excited to share with you my recipe for Leftover Prime Rib with Mushrooms and Mashed Potatoes. It is a delicious and easy meal that requires only 35 minutes of prep time and no cooking time! Let’s get started:
  • Begin by prepping your ingredients. Start by slicing your mushrooms into small pieces. Mince the garlic cloves and chop the fresh thyme and parsley.
  • Peel and dice the potatoes and set aside.
  • Heat 2 tablespoons of olive oil in a large skillet over medium-high heat. Once hot, add the mushrooms and cook for 2-3 minutes, stirring occasionally.
  • Add the leftover prime rib and cook for an additional 2-3 minutes.
  • Add the garlic, thyme, and season to taste with salt and pepper. Cook for 1 minute, stirring occasionally.
  • Turn off the heat and set the skillet aside.
  • In a large pot, add the diced potatoes and cover with water. Bring to a boil and cook for 10-15 minutes, or until the potatoes are fork-tender.
  • Drain the potatoes and add the milk, butter, and nutmeg. Mash until creamy.
  • To serve, divide the mashed potatoes onto plates. Top with the mushroom and prime rib mixture and garnish with fresh parsley. Enjoy!

Nutrition Facts

  • Calories: 260
  • Fat: 10g
  • Carbohydrates: 20g
  • Protein: 17g
  • Sodium: 200mg
  • Cholesterol: 30mg

What are the best ways to repurpose leftover prime rib?

If you’ve just finished up a delicious prime rib dinner, you know how hard it can be to part ways with the leftovers. But don’t let that prime rib go to waste—there are so many delicious ways to repurpose it! Here are some of the best ways to take your prime rib leftovers and turn them into a whole new meal.

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The easiest way to repurpose your leftovers is to turn them into a hearty sandwich. Simply slice up your leftover prime rib, add a little bit of mayo and dijon mustard, and sandwich it between two slices of crusty bread. Top it off with some lettuce, tomato, and your favorite cheese for a delicious lunch that’s perfect for taking on the go.

If you’re looking for something a bit more creative, try giving your leftovers a Mexican-inspired twist. Start by slicing up your prime rib, then warm it up on the stove with some sautéed onions, garlic, and jalapenos. Place it all in a warm tortilla and top with some freshly-grated cheese, guacamole, and a dollop of sour cream. This flavorful wrap is sure to be a hit!

For a tasty dinner, try whipping up a savory prime rib lasagna. Layer slices of prime rib with lasagna noodles, a creamy bechamel sauce, and your favorite cheese. Bake it all in the oven until it’s bubbly and golden brown. Serve it up with a big green salad for a comforting meal that will be sure to please.

Finally, if you’re looking for a creative way to use up your leftovers, consider making a prime rib pot pie. Start by prepping a creamy gravy, then add your prime rib, mushrooms, and mashed potatoes. Pour it all into a pie crust and bake in the oven until golden brown. Serve it with a side of steamed vegetables and you’ll have a delicious meal that’s sure to become a family favorite.

As you can see, there are plenty of delicious ways to repurpose leftover prime rib. From savory sandwiches to Mexican-inspired wraps, creative lasagnas, and comforting pot pies, there’s something for everyone.

How can you combine mushrooms and mashed potatoes to create an unforgettable dish?

If you’re looking for a dish that’s sure to delight and impress your dinner guests, try combining mushrooms and mashed potatoes with leftover prime rib! This delicious combination of flavors and textures will have everyone coming back for seconds.

First, start by sautéing mushrooms in butter and herbs. Use whatever variety of mushrooms you have on hand, or mix and match to create a truly unique flavor. Once the mushrooms are tender and fragrant, add in the leftover prime rib and let it heat through.

Next, get your mashed potatoes ready. If you’re using store-bought mashed potatoes, follow the instructions on the box. If you’re making your own, simply boil potatoes until they’re fork-tender, then mash them with butter, milk, and seasonings to taste.

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When your mashed potatoes are ready, mix them in with the mushrooms and prime rib. Stir everything together until it’s evenly combined.

What are the key tips to preparing a delicious meal with prime rib leftovers?

Start by re-heating the leftover prime rib in a skillet over medium heat. Make sure to stir the meat often to avoid it sticking to the pan.

  • Sauté mushrooms in a separate pan with butter and garlic until they are lightly browned.
  • Add the mushrooms to the skillet with the prime rib and mix everything together.
  • Prepare mashed potatoes according to package instructions and stir in butter and shredded cheese for added flavor.
  • Plate the mashed potatoes and top with the prime rib and mushrooms.
  • Sprinkle fresh parsley over the dish for a bit of color.
  • Serve the meal with a side of steamed vegetables for a balanced and delicious meal.

How can you elevate the flavor of this dish?

If you’re looking to take your leftover prime rib, mushrooms and mashed potatoes to the next level of deliciousness, there are plenty of ways to elevate the flavor of this dish. Whether you want to create a creamy and decadent sauce, bring out the richness of the prime rib with some complementary herbs, or add a bit of a kick to the potatoes, there are several easy and fun ways to elevate the flavor of this classic dish.

First, you can create a sauce to top the prime rib. Start by melting butter in a saucepan and adding some chopped shallots, garlic, and white wine. Simmer until the shallots are softened, then add a splash of heavy cream and let the sauce reduce. Finish with a sprinkle of fresh herbs such as rosemary or thyme, and you have a heavenly sauce to top your prime rib.

Next, you can bring out the flavor of the prime rib with some complementary herbs. Rub the prime rib with garlic, fresh herbs, and olive oil, then bake or roast until it’s cooked to your desired level of doneness. The herbs will add an earthy flavor to the prime rib that will bring out its richness and make it even more delicious.

Finally, you can add a bit of a kick to the mashed potatoes. Start by adding some freshly grated Parmesan cheese, garlic, and a sprinkle of chili powder to the potatoes. For an even bigger flavor boost, top the mashed potatoes with some toasted breadcrumbs and a sprinkle of smoked paprika.

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These simple and delicious ways to elevate the flavor of this classic dish will make your leftovers taste like a brand-new meal.

What ingredients will add a unique touch to the combination of prime rib, mushrooms and mashed potatoes?

Adding a unique twist to classic leftover prime rib with mushrooms and mashed potatoes is simpler than you might think! There are a few ingredients that will really take the flavor of this dish to the next level. For starters, consider adding some fresh garlic and rosemary; these flavors will add a delicious and aromatic taste. You can also add some freshly chopped parsley and a pinch of nutmeg for a nice, warm flavor. If you’re feeling adventurous, try adding some Worcestershire sauce, which will give the dish a great depth of flavor. Finally, don’t forget to add some freshly cracked black pepper for a nice kick.

What are the advantages of using prime rib leftovers to create a meal?

Using prime rib leftovers to create a meal is an excellent way to enjoy a restaurant-style dinner at home. There are a few advantages to using your leftover prime rib. First, you don’t have to spend time at the store and can use the ingredients you already have in the house. Second, the leftovers can be repurposed into something new and delicious. Last, you can enjoy a meal that tastes just as good as when you had it at the restaurant.

Using leftover prime rib to create a meal is a great way to save time and money. You can easily transform your leftovers into a new dinner. All you need to do is add some mushrooms and mashed potatoes and you’ve got a delicious and hearty meal. You can even add a side of steamed vegetables for a balanced dinner. The possibilities are endless with leftovers.

Using prime rib leftovers to create a meal also allows you to enjoy flavors and textures you enjoyed at the restaurant. Since you’re likely to have some of the same ingredients, you can recreate the meal you had with your family or friends. You can also add your own twist to the dish and try something new.

Using prime rib leftovers to create a meal is a great way to make the most of your leftovers. You can enjoy a delicious meal without having to go to the grocery store and spend a lot of money. Plus, you can experiment with different flavors and textures to create something new and delicious. All you need to do is add a few ingredients and you’ve got a restaurant-style dinner in your own home.

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