Preheat your oven to 375°F (190°C) and grease a baking dish lightly with oil

Heat a large skillet over medium-high heat and add olive oil

Add sliced onions and cook for 2–3 minutes until slightly softened

Add bell peppers and mushrooms, cooking for another 4–5 minutes until tender

Stir in minced garlic and cook for 30 seconds until fragrant

Add ground beef or sliced steak and cook until browned, breaking into small pieces

Season with salt, pepper, paprika, and garlic powder while cooking

Stir in Worcestershire sauce to enhance flavor depth

Drain any excess grease from the pan to avoid a heavy casserole

Reduce heat to medium-low and add cream cheese to the skillet

Stir continuously until cream cheese melts and coats the beef mixture

Pour in heavy cream and mix until a smooth, creamy sauce forms

Remove from heat once everything is well combined

Transfer the mixture evenly into the prepared baking dish

Sprinkle shredded mozzarella evenly across the top

Layer provolone cheese slices over the mozzarella for extra melt

Finish with a light sprinkle of parmesan cheese

Bake in the oven for 20–25 minutes until cheese is melted and bubbly

Broil for 2–3 minutes for a golden, slightly crispy top

Remove from oven and let it rest for 5–10 minutes before serving

Garnish with chopped parsley if desired

Serve warm and enjoy