If your beef is not already sliced thin and flat. You will need to pound them out flat enough to roll. (Now I usually buy them two per pkg , but you can get a family pack)
After you have your steak flattened season the the side that is face up with the McCormick steak seasoning.
I then slice my Mozzarella into long strips to fit on top of the steak. ( now i buy fresh mozz. already in a roll, it is easier to work with)I have found it at Walmart.
I then take my defrosted spinach and put it n top of the mozzarella and I then season with a little salt n pepper.
Then on a plate put some Olive Oil and some more McCormick seasoning. Take your meat from both ends and set on the plate (you can move it back n forth a little to make sure that side is seasoned. Then just roll it together and toothpick. That way you get both sides seasoned.
We grill ours for almost 30 mins. Depending on how you like your beef (I prefer mine well) You can also bake in the oven.