Cut the tenderloin steak into cubes.
Skewer the cubed meat.
Season the skewered meat with salt and pepper.
Refrigerate the skewered meat for at least 3 hours.
Make a rosemary garlic butter sauce.
Preheat a cast iron grill until smoking hot.
Cook the steak skewers for 2 minutes on one side, then flip and cook for another 2 minutes.
Cook the steak skewers for 1 minute on the two remaining sides.
Serve the steak skewers over chives and drizzle with the rosemary garlic butter.
Serve with a horseradish aoli.
