Cut steak into bite-sized cubes
Pat the steak dry
Season with salt and pepper
Heat a skillet over medium-high heat
Add oil to the skillet
Place steak bites in a single layer
Sear without overcrowding
Turn and cook until browned on all sides
Add butter and minced garlic if desired
Toss the steak bites in the pan
Cook to desired doneness
Remove from heat
Serve immediately