Sear the Steak
Season steak cubes with salt and pepper.
Melt butter in a skillet over medium heat, then sauté garlic until fragrant (about 30 seconds).
Add steak and cook until browned to your desired doneness. Remove from heat and set aside.
Cook the Pasta
Boil pasta shells according to package instructions. Drain and set aside.
Make the Alfredo Sauce
In a saucepan, heat heavy cream over medium-low heat.
Stir in Parmesan cheese until melted and smooth.
Combine & Serve
Toss the cooked pasta in the Alfredo sauce.
Top with garlic butter steak bites and garnish with fresh parsley.