Preheat your oven to 350°F (175°C) and coat a 9x13-inch baking dish with non-stick spray.

In a large skillet, heat 1 tablespoon of olive oil over medium heat and sauté the diced onion and bell peppers for 5-6 minutes.

Add 2 pounds of ground beef, season with salt and pepper, and cook for 7-8 minutes until browned.

Stir in 2 tablespoons of Worcestershire sauce and 8 ounces of softened cream cheese until well combined.

Spread the mixture into the prepared baking dish, layer with 8 ounces of provolone cheese, and top with 1.5 cups of shredded mozzarella cheese.

Bake for 22-25 minutes until the cheese is melted and bubbly.

Let the casserole rest for about 5 minutes before serving.