Have your flank steak butterflied and get butcher's string to tie off. I marinate the flank steak with Good Seasonings dressing...Garlic Cheese, follow instructions on package but use olive oil not any other kind and add grated parmasean cheese, shake and pour over flank steak, cover and marinade all day.
Remove and open up get ready to stuff. Have sausage cooked and chopped up, steam your fresh spinach and cool before stuffing. Lay your spinach on top of the flank steak, next sausage, next provolone on top. Start rolling up and tie put back in marinade and bake in oven 325 for 1 hour, it will be medium, let rest and slice. Enjoy