1. 1. Prepare the steak: Pat steak cubes dry with paper towels. In a bowl, toss with olive oil, garlic powder, onion powder, ½ tsp salt, and ½ tsp black pepper.

2. 2. Cook pasta: Bring a large pot of salted water to a boil. Add shell pasta and cook until al dente. Reserve 1 cup pasta water, then drain pasta.

3. 3. Sear steak: Heat a large skillet over medium-high heat. Add steak bites in a single layer (work in batches if needed). Cook 2-3 minutes per side for medium-rare. Remove from pan and set aside.

4. 4. Sauté garlic butter: Reduce heat to medium. Add butter to the skillet. Once melted, add minced garlic and sauté 1-2 minutes until fragrant.

5. 5. Build Alfredo sauce: Pour in heavy cream. Bring to a gentle simmer over low heat. Gradually whisk in Parmesan cheese until smooth. Season with ½ tsp salt and ¼ tsp pepper. If too thick, add a splash of reserved pasta water.

6. 6. Combine and serve: Return cooked pasta to the skillet. Add seared steak bites. Toss gently to coat. Garnish with parsley and red pepper flakes if desired. Serve immediately.