Pat steak dry with paper towels
Cut into bite-size pieces
Season with salt, black pepper, and any desired spices
Heat a skillet over medium-high heat
Add oil or butter to the skillet
Place steak bites in a single layer
Sear without overcrowding
Cook for 1 to 3 minutes per side
Turn pieces until browned on all sides
Add garlic or herbs if desired near the end
Cook to desired doneness
Remove from heat
Rest for a few minutes before serving