Cook penne pasta in a large pot of salted boiling water according to package instructions until al dente; reserve 1/2 cup of pasta water and drain.
Season steak strips with salt and 1 teaspoon of the cracked black pepper.
In a large skillet, heat olive oil over medium-high heat. Sear steak strips in batches until browned, about 2 minutes per side. Remove steak from skillet and set aside.
Reduce heat to medium. In the same skillet, melt butter. Add minced garlic and the remaining cracked black pepper; sauté for 1 minute until fragrant.
Pour in heavy cream and bring to a gentle simmer. Cook for 3-4 minutes until slightly thickened.
Whisk in the grated parmesan cheese until melted and smooth.
Return the steak and cooked pasta to the skillet. Toss to coat thoroughly, adding reserved pasta water if necessary to adjust sauce consistency.
Garnish with fresh parsley and serve immediately.