Prepare: Slice steak into roughly 2″ pieces and set aside in a mixing bowl.
Season: In a small bowl, combine seasoning blend ingredients, then add to the mixing bowl with the steak bites and toss to combine well.
Preheat skillet: Heat a large heavy bottomed skillet over MED HIGH heat. Do this while the skillet is dry, and heat for several minutes, or until you see wisps of smoke.
Sear (in batches): Add 1 Tbsp of vegetable oil and swirl to coat the pan. Add about half the steak (adding less steak if the skillet isn’t very big – making sure not to overcrowd the skillet). Sear for 2 minutes without flipping, then flip over and sear another 2 minutes, until well browned. Set aside on a plate and repeat with remaining vegetable oil and steak bites.
Make garlic butter: Reduce heat to MED LOW and use the same skillet (don’t wash it – you want all that flavor!), and add butter. Once melted, add garlic and cook about 30 seconds or so, using a wooden spoon to scrape browned bits from the bottom of the pan.
Combine and serve: Turn off the heat, add steak bites back to the skillet and stir well to combine with the garlic butter. Serve hot, sprinkled with minced fresh parsley.
Notes
If you want smaller steak bites, you can cut the steak into about 1 inch pieces, and cook for slightly less time.
Cajun seasoning blend can be tweaked to your tastes.