Pat the steak cubes dry with paper towels and season evenly with salt and black pepper.
Heat olive oil in a large cast-iron skillet over high heat until smoking.
Add steak bites in a single layer, ensuring they do not crowd the pan; sear for 2 minutes without moving to develop a crust.
Flip the steak bites and sear for another 1-2 minutes until browned on all sides.
Reduce heat to medium-low and add the butter and minced garlic to the skillet.
Toss the steak bites continuously for 1 minute until the butter is foamy and the garlic is fragrant.
Spread the steak bites evenly across the pan and sprinkle the shredded cheese over the top.
Cover the skillet with a lid for 60 seconds or until the cheese is fully melted.
Garnish with dried parsley and serve immediately.