Begin by boiling water in a large pot and add salt. Once boiling, add the rigatoni pasta and cook according to the package instructions until al dente, about 10-12 minutes. Drain and set aside.
While the pasta is cooking, season the steak tips with salt and pepper. In a large skillet, heat the olive oil over medium-high heat. Add the steak tips and sear them for about 3-4 minutes on each side until browned and cooked to your liking. Remove from the skillet and set aside.
In the same skillet, lower the heat to medium and add the butter. Once melted, add the minced garlic and dried thyme. Sauté for about 1-2 minutes until fragrant.
Return the steak tips to the skillet and toss them in the garlic butter sauce, ensuring they are well-coated. Remove from heat.
In a medium bowl, combine the heavy cream, mozzarella cheese, and Parmesan cheese. Mix until smooth and creamy. Pour this mixture over the cooked rigatoni pasta, stirring to combine well.
To serve, plate the cheesy rigatoni and top with the garlic butter steak tips. Garnish with freshly chopped parsley.
Enjoy your Garlic Butter Steak Tips with Cheesy Rigatoni!