Creating your own Cheesy Low Carb Philly Cheesesteak Casserole is simple when you follow these straightforward steps:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C).

2. Sauté Vegetables: In a large skillet, heat the olive oil over medium heat. Add the sliced onion and bell pepper. Sauté until they are softened and caramelized, about 5-7 minutes. Add the minced garlic and cook for an additional minute.

3. Cook Steak: Increase the heat to medium-high and add the sliced steak to the skillet. Season with salt, pepper, and Worcestershire sauce. Cook until the steak is browned, approximately 5 minutes.

4. Combine Cheese: In a mixing bowl, combine the softened cream cheese, provolone cheese, and half of the mozzarella cheese. Stir until blended and smooth.

5. Layer Ingredients: In a greased 9×13-inch casserole dish, layer the cooked steak and vegetables. Evenly distribute the cheese mixture over the top.

6. Add Remaining Cheese: Sprinkle the remaining mozzarella cheese on top of the casserole.

7. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is melted and bubbly.

8. Garnish and Serve: Remove from the oven and let it sit for a few minutes. Garnish with chopped fresh parsley if desired before serving.

With these clear steps, you can confidently make your Cheesy Low Carb Philly Cheesesteak Casserole at home!