Preheat oven to 400 degrees. Start by laying 5 pieces of prosciutto side by side and layering the drained spinach on top, then the shredded cheese.
Mix together the ground pork, dried oregano, onion powder, eggs, breadcrumbs together mix well. Get in their with your hands don't worry. My mom used to say you can't trust a clean or skinny chef. So get in their.[mv_img id="570"
Prepare your work surface by placing a sheet of wax paper on the counter or table.
Place the ground meat mixture on the wax paper and pat it down flat to about one inch thick and about 8" long by 6" wide. Place the layered prosciutto, spinach, cheese close to the bottom of the meat mixture, Roll the prosciutto so that the spinach and cheese are inside.
Using the wax paper at the end, begin to roll the meat. Once the meat meets the other side, you'll need to lift to wax paper to keep rolling the meet until you get to the end.
Gently place the roll in a roasting pan. Tuck the prosciutto in if it is sticking out. Place in oven covered. Cook at 400 degrees for about 45 minutes or until done. Remove lid to brown top as the final cooking temperature is reached. Remove from oven when done and let rest for 10 minutes before serving.