Making the Low Carb Philly Cheesesteak Casserole is straightforward. Follow these steps for a delicious result:

1. Preheat oven to 350°F (175°C).
2. In a skillet, heat olive oil over medium heat. Add sliced onions and peppers, sautéing until they’re softened, approximately 5-7 minutes.
3. Add ground beef to the skillet, breaking it apart with a spatula. Cook until browned, about 7-10 minutes.
4. Season mixture with garlic powder, onion powder, salt, and black pepper. Stir to combine, cooking for another 2 minutes.
5. Pour in heavy cream and mix until well blended. Allow the mixture to simmer for 2-3 minutes to thicken slightly.
6. Transfer mixture to a greased 9×13-inch casserole dish.
7. Sprinkle shredded provolone and mozzarella cheese evenly over the top.
8. Bake in preheated oven for 30-35 minutes, or until the cheese is bubbly and golden brown.
9. Remove from the oven and let it cool for about 5-10 minutes before serving.
10. Garnish with parsley before serving for an extra touch of freshness.

This step-by-step guide will help you create a satisfying casserole that will impress even those who are not watching their carb intake.