Season the steak cubes generously with salt and pepper.

Heat olive oil in a large cast-iron skillet over high heat until smoking.

Add the steak bites in a single layer and sear for 2-3 minutes without moving them to develop a crust.

Reduce heat to medium, add the butter and minced garlic. Toss the steak in the melting garlic butter for 1-2 minutes until cooked to your liking.

Remove from heat, garnish with fresh parsley, and serve immediately.