Trim the steak into small, even cubes, around 1-inch in size. Season generously with salt and pepper and let sit at room temperature for 10 minutes.

Heat a large skillet over medium-high heat. Add olive oil, and once shimmering, add the steak bites in a single layer. Sear for 2-3 minutes on one side, then flip and cook for another 2-3 minutes. Remove from skillet and keep warm.

Lower the heat and add butter to the skillet. Once melted, add minced garlic and sauté for 1 minute until fragrant.

Gradually stir in heavy cream and simmer for 2-3 minutes until thickened. Add grated Parmesan cheese and stir until melted and smooth.

Return the seared steak bites to the skillet, toss gently in the sauce, and heat for an additional 1-2 minutes.

Remove from heat and garnish with chopped parsley. Serve immediately.