Kosher salt and freshly ground black pepperto taste
1tablespoonavocado oilor other high heat oil
3tablespoonsbutter
4largegarlic clovesminced
minced fresh parsleyfor garnish, optional
Instructions
Trim excess fat and any gristle from steak and cut into 1-inch cubes. Pat dry with paper towels and season generously with salt and pepper.
Heat oil in a large cast iron skillet (or other non-stick skillet) over medium-high heat until shimmering. Add steak cubes in a single layer; cook 2-3 minutes without disturbing, until one side is has formed a deep golden-brown crust. Turn with spatula and let cook 1 to 3 minutes more, until well seared on the outside and still pink in the center. Transfer steak to clean plate and reduce heat to medium.
Add butter to skillet and stir to melt. Add minced garlic; cook and stir until tender, 1 to 2 minutes, scraping up any browned bits (reduce heat if it starts to brown). Remove from heat and add steak bites; stir to coat. Season with salt and pepper to taste and sprinkle with parsley if desired. Leave in skillet or transfer to platter; serve.