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

Season steak bites with salt, pepper, and Italian seasoning. Heat olive oil in a large skillet over medium-high heat. Add steak bites and sear for 3-4 minutes until browned on all sides. Remove steak from skillet and set aside.

In the same skillet, melt butter over medium heat. Add minced garlic and sauté for 1 minute until fragrant. Pour in heavy cream and bring to a simmer.

Stir in grated Parmesan cheese until the sauce is smooth and creamy. Add cooked rigatoni and steak bites to the skillet, tossing to coat everything in the Alfredo sauce.

Garnish with fresh parsley and serve immediately.