01 -
Preheat your grill to 350°F for direct cooking. Place a cast iron skillet on the grill 2 minutes before cooking.
02 -
Melt beef tallow in the skillet and add thinly sliced white onions. Season with salt and pepper. Cook on medium heat, stirring frequently for 45-60 minutes, until dark brown. Add garlic and rosemary, cooking for another 2 minutes.
03 -
Deglaze the skillet with bourbon and beef broth. Add brown sugar and simmer until most of the liquid evaporates, about 3-5 minutes. Keep warm.
04 -
Lay skirt steak on a cutting board, slice in half, and cover with parchment or plastic wrap. Use a heavy mallet to pound the steak to less than ½ inch thick. Mix salt, pepper, and garlic powder, then brush steak with oil and season both sides.
05 -
Add a layer of Swiss cheese and a line of caramelized onions on the steak. Roll the steak lengthwise to form a pinwheel, secure with two butcher twine strings, and slice between them to make individual pinwheels. Season tops with salt, pepper, and garlic powder.
06 -
Preheat the grill to a two-zone 400°F heat. Place pinwheels on the hot side to sear each side for 1 minute until a crust forms.
07 -
Move pinwheels to the cool side of the grill and cook until they reach an internal temperature of 125°F, about 10-15 minutes.
08 -
Remove steaks and let rest for 10 minutes. Mix ingredients for the cheese crust, apply to each steak, and broil or torch until caramelized. Slice and serve.