01 -
Boil macaroni in well-salted water until al dente. Drain thoroughly and set aside.
02 -
Heat olive oil in a large skillet over medium-high heat. Sauté the sliced onion and green bell pepper until softened and lightly caramelized, approximately 5 to 6 minutes. Add steak slices, season with salt and black pepper, and cook just until browned. Remove the steak and vegetables from the skillet and set aside.
03 -
In the same skillet or in a saucepan, melt butter over medium heat. Whisk in the flour and cook for 1 minute, stirring constantly. Gradually whisk in the milk and bring to a gentle simmer. Stir in garlic powder, salt, and black pepper. Add shredded provolone and cheddar, mixing until cheese is fully melted and sauce is smooth.
04 -
Incorporate the drained pasta into the cheese sauce, then fold in the cooked steak and vegetables mixture, ensuring all components are evenly coated.
05 -
Optionally, transfer mixture to an oven-safe skillet or dish. Sprinkle with extra shredded cheese and broil for 2 to 3 minutes until the top is golden and bubbling.
06 -
Garnish with chopped parsley or chives as desired. Serve immediately while hot and creamy.