Creating the Cheesy Low Carb Philly Cheesesteak Casserole is simple if you follow these straightforward steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook the Beef: In a large skillet over medium heat, brown the ground beef until fully cooked. Drain excess fat.
3. Add Vegetables: Add the diced onion and bell peppers to the pan with the beef. Cook until the vegetables are tender, about 5-7 minutes.
4. Mix in Cheese and Spices: Lower the heat and add the cream cheese to the beef mixture. Stir until melted and well combined. Add Worcestershire sauce, garlic powder, onion powder, salt, and pepper. Mix well.
5. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish and spread it out evenly.
6. Add Cheeses: Top the beef mixture with shredded provolone and mozzarella cheese, spreading them evenly over the top.
7. Bake: Place the baking dish in the oven and bake for 25-30 minutes, or until the cheese is bubbly and golden brown.
8. Garnish and Serve: Remove the casserole from the oven, let it cool for a few minutes, and then garnish with fresh parsley, if desired.

These simple steps will guide you in preparing this amazing casserole effortlessly.