Philly Cheesesteak-Stuffed Portobello Mushrooms


We've taken the key ingredients of a Philly cheesesteak--onions, peppers, thinly sliced beef and provolone cheese--and piled them into portobello mushroom caps to make a meaty and satisfying low-carb main dish.

Prep Time:
20 mins
Additional Time:
15 mins
Total Time:
35 mins
4 stuffed mushrooms


  • 4 large portobello mushrooms, stems and gills removed (see Tip)

  • 3 tablespoons extra-virgin olive oil, divided

  • 1 cup thinly sliced onion

  • 3 cups thinly sliced bell peppers

  • ½ teaspoon ground pepper, divided

  • ¼ teaspoon salt, divided

  • 8 ounces beef strip loin, thinly sliced

  • 3 ounces sliced provolone cheese

  • Chopped parsley for garnish


  1. Preheat oven to 350 degrees F. Place mushroom caps on a large rimmed baking sheet and brush all sides lightly with 1 tablespoon oil. Arrange the mushrooms stem-side up.

  2. Heat 1 tablespoon oil in a large skillet over medium heat. Add onion and cook, stirring, until starting to soften, about 3 minutes. Add peppers, 1/4 teaspoon pepper and 1/8 teaspoon salt; cook, stirring, until the peppers are softened, 4 to 5 minutes. Transfer the vegetables to a plate.

  3. Season beef with the remaining 1/4 teaspoon pepper and 1/8 teaspoon salt. Heat the remaining 1 tablespoon oil in the skillet; add the beef and cook, stirring, until browned on all sides, 2 to 3 minutes. Return the vegetables to the pan and stir to combine. Fill each of the prepared mushrooms with about 3/4 cup filling and top with 3/4 ounce cheese. Bake until the mushrooms are tender and the cheese has melted, 12 to 15 minutes. Sprinkle with parsley before serving, if desired.


Tip: To prepare portobello mushroom caps, gently twist off the stems of whole portobellos. Using a spoon, scrape off the brown gills from the underside of the mushroom caps. If you prefer, purchase portobello mushroom caps, rather than whole mushrooms.

Nutrition Facts (per serving)

333 Calories
20g Fat
14g Carbs
25g Protein
Nutrition Facts
Servings Per Recipe 4
Calories 333
% Daily Value *
Total Carbohydrate 14g 5%
Dietary Fiber 4g 13%
Total Sugars 7g
Protein 25g 50%
Total Fat 20g 26%
Saturated Fat 7g 34%
Cholesterol 61mg 20%
Vitamin A 5713IU 114%
Vitamin C 168mg 187%
Folate 58mcg 15%
Sodium 378mg 16%
Calcium 194mg 15%
Iron 2mg 12%
Magnesium 43mg 10%
Potassium 789mg 17%

Nutrition information is calculated by a registered dietitian using an ingredient database but should be considered an estimate.

* Daily Values (DVs) are the recommended amounts of nutrients to consume each day. Percent Daily Value (%DV) found on nutrition labels tells you how much a serving of a particular food or recipe contributes to each of those total recommended amounts. Per the Food and Drug Administration (FDA), the daily value is based on a standard 2,000 calorie diet. Depending on your calorie needs or if you have a health condition, you may need more or less of particular nutrients. (For example, it’s recommended that people following a heart-healthy diet eat less sodium on a daily basis compared to those following a standard diet.)

(-) Information is not currently available for this nutrient. If you are following a special diet for medical reasons, be sure to consult with your primary care provider or a registered dietitian to better understand your personal nutrition needs.

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