Preheat oven at 325. Bake with foil tented over meat 45 minutes, depending on how medium or done you like your flank steak. 45 minutes is medium and has to rest 10 minute or so before cutting. I slice my pieces at least 1 1/2 to 2 inches thick. That's your choice. Enjoy
Open the butterflyed steak, place cleaned spinach leaves up the center, then stuffing, then cooked chirozo sausage, then pepper jack cheese. Roll up like a roast beef, tye with butchers string, like a roast beef. Pour salsa over the top. Tent loosly with foil, place in oven 45 minutes or until done to your desired taste. Rest 10 minutes and slice.
Pre cook your chirozo sausage and crumble and pre cook your stove top stuffing before placing them in steak and rolling and tying up.