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A low carb Philly cheesesteak casserole with melted cheese and steak

Low Carb Philly Cheesesteak Casserole with Mushroom Mania

Enjoy a delicious and satisfying low-carb Philly cheesesteak casserole with a savory mushroom twist, perfect for a cozy meal.
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Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Servings: 6 servings
Calories: 450
Ingredients Equipment Method Notes

Ingredients
  

Main Ingredients
  • 1 tablespoon olive oil
  • 1.5 lbs thinly sliced ribeye steak or sirloin shaved steak works well
  • 1 large onion thinly sliced
  • 1 green bell pepper thinly sliced
  • 1 red bell pepper thinly sliced
  • 8 ounces sliced mushrooms
  • 8 ounces cream cheese softened
  • 1/2 cup heavy cream
  • 1/2 teaspoon garlic powder
  • 1/4 teaspoon black pepper
  • Salt to taste
  • 1.5 cups shredded provolone cheese
  • 1/2 cup shredded mozzarella cheese
  • 2 tablespoons chopped fresh parsley Optional: for garnish

Equipment

  • Oven
  • Large skillet or cast-iron pan
  • 9x13 inch baking dish

Method
 

Preparation
  1. Preheat your oven to 375°F (190°C) and prepare a large skillet or cast-iron pan.
  2. Heat olive oil in the skillet, then sauté onions, bell peppers, and mushrooms for 8-10 minutes until tender and caramelized. Remove and set aside.
  3. Add more olive oil if needed, then brown the thinly sliced steak in batches for 2-3 minutes per side, seasoning with salt and pepper.
  4. Reduce heat, then melt softened cream cheese, heavy cream, garlic powder, and black pepper in the same skillet until smooth.
  5. Spread half of the cheese sauce in a 9x13 inch baking dish; layer with half of the steak, vegetables, and both cheeses.
  6. Repeat the layering process with the remaining ingredients, topping generously with the rest of the shredded cheeses.
  7. Bake for 20-25 minutes until bubbly and golden, then optionally broil for 1-2 minutes for a crispier top.
  8. Remove from oven, let rest for a few minutes, garnish with fresh parsley if desired, and serve immediately.

Notes

For even quicker prep, use pre-sliced mushrooms and shaved steak. Adjust the amount of garlic powder and black pepper to your taste. If you don't have provolone, mozzarella can be used entirely, but provolone adds a classic Philly cheesesteak flavor. This casserole makes great leftovers and can be reheated gently in the oven or microwave.