Prepare the broccoli rabe by discarding coarse leaves, trim the stems by 1/2 inch, rinse and set aside. Bring water to boil, cook broccoli rabe for 2 minutes and drain. In a frying pan, heat oil, garlic, salt and hot pepper, add broccoli rabe and cook for 2 to 3 minutes. Allow rabe to cool, and cut into 1-inch pieces.
Begin to butterfly the pork tenderloin evenly. Lay flat on clean surface and top with 3 slices of prosciutto, then add chopped broccoli rabe. Start to roll the tenderloin from the bottom. Tie with 14-inches of butcher string making a knot.
Grill on covered barbecue for approximately 25 to 35 minutes on medium to high flame. Drizzle with white wine and cook for additional 2 minutes. Turn occasionally to cook evenly.