Bring a large pot of salted water to a boil. Add the shell pasta and cook according to package instructions until al dente. Drain and set aside.

Season the steak pieces with salt and black pepper.

In a large skillet, heat olive oil over medium-high heat. Add the steak bites and cook for about 3-4 minutes, until browned and cooked to your desired doneness. Remove from skillet and set aside.

In the same skillet, melt the butter over medium heat. Add minced garlic and sauté for about 1 minute until fragrant.

Pour in the heavy cream and bring to a simmer. Stir in the Parmesan cheese until melted and smooth. Season with Italian seasoning, salt, and black pepper.

Add the cooked shell pasta and steak bites to the Alfredo sauce. Toss to coat evenly.

Serve hot, garnished with chopped parsley.