Fall Bubble and Squeak with Garlicky Mushrooms and Fried Egg

Use up leftover potatoes and vegetables to make this fall bubble and squeak with garlicky mushrooms an a fried egg! Gluten free and vegetarian! 

Disclosure: This post was sponsored by the US Potato Board. I was compensated for my time. All expressed thoughts and opinions are my own. Thanks for supporting the brands that make this blog possible!

Hello fall.

As I'm writing this, I'm snuggled up in my office with my favorite cozy blanket and a space heater pointed at my feel. Yes, I know it's a high of 75 degrees today but PSL is on the menu at Starbucks, I've already seen my first Christmas themed commercial and I think I saw a few dead leaves on the ground. Don't judge me.

Living in South Carolina, I never change out my wardrobe since we can get heat waves any time of year. But I do change out our menu. Buh-bye crisp salads, summer fruits and juicy tomatoes. Hello cozy soups, roasted brussels sprouts and potato everything!

One of my favorite things about potatoes is their versatility. When I saw potato, you're probably think mashed potatoes, baked potatoes or fries. But there's a whole world of possibility out there! Potatoes have been a major staple in South American cuisine for thousands of years, and since being introduced to the rest of the world, they've become one of the most consumed foods worldwide.

No where is that more true than in Europe, where they have a major love affair with the spud. In Spain, potatoes are sliced thin, fried in olive oil and cooked with custardy eggs to make a Spanish tortilla. In Ireland, potatoes are mashed with kale to make buttery, creamy colcannon. In France, potatoes are sliced thin, layered and cooked in tons of butter to make potatoes Anna. And then there's my personal favorite from Italy, the fluffy little pillows of deliciousness called gnocchi.

For this post with the US Potato Board, I was asked to create a European-style potato recipe that could be made in less than 30 minutes. I knew it was time to break out my bubble and squeak recipe, my favorite way to use up extra mashed potatoes and veggies. You'll definitely want to pin this one for the day after Thanksgiving!


Check out this recipe for a potato lobster roll by Honest Cooking: 

Probably named for the bubbling, squeaky noises it makes while cooking, bubble and squeak is a popular UK dish made by frying a mixture of leftover mashed potatoes and vegetables, something we always have in our house in the fall and winter. I like to make little patties and top it with a fried egg, or you could press the entire mixture into the skillet and make a "cake," almost like a potato frittata and serve slices as a side dish. If you like, you could even add leftover meat to make it a complete meal. I love to serve this as dinner, or for breakfast/brunch the day after cooking a full meal.

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Fall Bubble & Squeak with Garlicky Mushrooms and Fried Egg

Author: Rachael Hartley, RD, LD, CDE, CLT
Serves: Serves 6


  • 4 cups leftover mashed potatoes
  • 3 cups leftover steamed or roasted fall vegetables
  • ¼ cup extra virgin olive oil, divided, plus more for frying eggs
  • 1 onion, peeled and chopped
  • 4 garlic cloves, peeled and minced, divided
  • 8 ounces mushrooms, quartered
  • 6 eggs


  1. In a large bowl, mix together mashed potatoes and vegetables.
  2. Heat 1 tablespoon olive oil in a large skillet on medium-high heat. Add onion and cook 5 minutes until translucent. Add half the garlic and cook 2 more minutes. Scrape sautéed vegetables into the mashed potato mixture and stir to combine. If needed, season with salt and black pepper to taste. Wipe skillet clean with a paper towel.
  3. While onion is cooking, saute the mushrooms. Heat 1 tablespoons olive oil in a medium skillet on medium heat. Add garlic and cook 60 seconds. Add mushrooms and cook 7 minutes, stirring occasionally, until mushrooms are tender and have released their liquid. Season with salt and pepper.
  4. Heat 2 tablespoons olive oil in the cleaned large skillet on medium-high heat. Using a cup measure, take 6 scoops of potato mixture and form into patties. Place in the hot skillet and cook 5 minutes per side until well browned.
  5. While potato patties are cooking, fry eggs in olive oil.
  6. Serve potato patties topped with a scoop of sautéed mushrooms and a fried egg.

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Romesco Chicken and Kale Mashed Potatoes
Crispy Roasted Potatoes with Spicy Red Pepper Sauce

Crispy Roasted Potatoes with Spicy Red Pepper Sauce