Heat olive oil in a large skillet over medium-high heat

Add sliced peppers, onions, and mushrooms (if using), sauté until softened

Remove vegetables and set aside

In the same skillet, add beef and cook until browned and tender

Season with salt, pepper, and garlic powder

Add minced garlic and cook briefly until fragrant

Pour in beef broth and stir to deglaze the pan

Add cream cheese and stir until melted into a creamy sauce

Return vegetables to the skillet and mix well

Sprinkle shredded cheese evenly over the top

Cover and cook on low until cheese is melted and bubbly

Garnish with parsley and serve hot