Cut the steak into approximately 1 ½-inch pieces and pat them dry with a paper towel. Sprinkle with salt and pepper on all sides.

Heat a large stainless steel or cast iron skillet over medium heat for about 3 minutes, then add 1 tablespoon of butter. When the butter begins to sizzle and brown, add the steak bites in a single layer.

Sear the steak bites for about 3 minutes without moving them. Flip them over and sear until well browned and cooked to medium doneness, about 2 to 3 minutes.

Turn the heat down to medium-low. Add the remaining 2 tablespoons of butter and the chopped garlic to the pan. Sauté until the garlic is cooked through.

Remove the pan from the heat. Add the steak bites back to the pan and toss to coat them evenly with the garlic butter. Transfer the steak bites to a serving dish, sprinkle with parsley, and serve right away.