Making this delicious Cheesy Low Carb Philly Cheesesteak Casserole is simple when you follow these easy steps:

1. Preheat your oven to 350°F (175°C).
2. Sauté the beef: In a large skillet over medium-high heat, add 1 tablespoon of olive oil. Add the thinly sliced beef and season with salt, pepper, and Italian seasoning. Cook until browned, about 5-7 minutes. Remove beef from skillet and set aside.
3. Sauté the vegetables: In the same skillet, add the remaining tablespoon of olive oil. Sauté the sliced onion and bell pepper until softened, about 5-7 minutes. Add minced garlic and cook for an additional 1-2 minutes until fragrant.
4. Combine beef and vegetables: Return the cooked beef to the skillet with the vegetables. Mix well to combine.
5. Add cream cheese: Reduce the heat to low and add the softened cream cheese, stirring until melted and well incorporated into the beef and vegetable mixture.
6. Transfer to baking dish: Pour the beef filling into a greased baking dish (8×8 or similar size).
7. Top with cheeses: Sprinkle the shredded provolone and mozzarella cheese evenly over the beef mixture.
8. Bake: Place the baking dish in the preheated oven and bake for about 20-25 minutes or until the cheese is bubbly and golden.
9. Garnish and serve: Once baked, remove from the oven and let it cool for a few minutes. Garnish with fresh parsley if desired.

This step-by-step guide ensures that you develop a wonderfully cheesy low-carb casserole.