01 -
Preheat oven to 375°F. In a large skillet, heat 1 tbsp olive oil over medium-high heat. Add 1 large yellow onion, thinly sliced, 1 large green bell pepper, thinly sliced, and 8 oz cremini mushrooms, sliced. Sauté for 7-10 minutes until softened and lightly browned.
02 -
Push vegetables to one side of the skillet. Add 1 1/2 lbs thinly sliced or shaved beef sirloin to the empty side. Cook for 3-5 minutes, breaking it up, until browned. Stir in 2 cloves garlic, minced, and cook for 1 minute more until fragrant. Combine beef and vegetables.
03 -
In a medium bowl, whisk together 8 oz cream cheese, softened, 1/2 cup heavy cream, 1/4 cup beef broth, 1 tsp Worcestershire sauce, 1/2 tsp onion powder, and 1/2 tsp garlic powder. Season with salt and black pepper to taste. This forms the creamy base for your Savory Low Carb Philly Cheesesteak Casserole.
04 -
Pour the velvety cheese sauce over the beef and vegetable mixture in the skillet. Stir well to ensure everything is evenly coated. Transfer this delicious mixture into a 9x13 inch baking dish, spreading it out evenly. This is the heart of your Savory Low Carb Philly Cheesesteak Casserole.
05 -
Arrange 8 oz provolone cheese, sliced, evenly over the top of the casserole mixture. Sprinkle with 1/2 cup shredded mozzarella cheese. This golden topping will create a beautiful crust for your Savory Low Carb Philly Cheesesteak Casserole.
06 -
Bake the casserole in the preheated oven for 20-25 minutes, or until the cheese is melted, bubbly, and lightly golden brown. Keep an eye on it to prevent over-browning.
07 -
Remove the Savory Low Carb Philly Cheesesteak Casserole from the oven and let it rest for 5-10 minutes before serving. Garnish with 2 tbsp fresh parsley, chopped, for a fresh finish. Enjoy this hearty low-carb meal!