Cook the Pasta: Begin by cooking your pasta according to the package instructions in a large pot of salted boiling water. Cook until al dente, usually about 8-10 minutes, tasting a piece to ensure it maintains a slight bite. Drain and set aside, reserving a cup of pasta water.
Prepare the Steak: While the pasta cooks, season the sliced steak generously with salt and pepper. Heat the olive oil in a large skillet over medium-high heat until shimmering. Add the steak in a single layer and cook for 3-4 minutes, or until browned. Flip and cook for an additional 2-3 minutes, until the steak is cooked to your desired doneness. Remove the steak from the skillet and set aside.
Make the Garlic Parmesan Sauce: In the same skillet, melt the butter over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant. Pour in the heavy cream, stirring continuously, and bring to a gentle simmer.
Incorporate the Cheese: Gradually whisk in the Parmesan cheese, continuing to stir until the cheese is melted and the sauce is smooth. Add the Italian seasoning, salt, and pepper to taste.
Combine Pasta and Steak: Add the cooked pasta and steak to the skillet, tossing to coat everything evenly with the creamy garlic parmesan sauce. Cook for an additional 1-2 minutes.
Serve: Remove from heat and garnish with chopped parsley and extra Parmesan cheese. Serve immediately while hot.
