Boil shell pasta according to package instructions. Drain and set aside.
Sear the Steak Bites:
In a skillet, melt butter over medium-high heat. Add steak bites, season with salt and pepper, and cook for 4-5 minutes until browned. Stir in garlic and thyme and cook for 30 seconds. Remove from the skillet and set aside.
Prepare the Creamy Sauce:
In the same skillet, melt butter, then add heavy cream, garlic powder, and Parmesan cheese. Stir continuously for 3-4 minutes until the sauce thickens.
Combine Pasta and Steak:
