Pre-heat the oven to 325°F.
Combine the pancetta, fennel pollen and garlic in a small bowl.
Cut 18-20 slits (2 inches deep) in the pork roast. Alternately fill the slits with the pancetta mixture and a piece of rosemary. Sprinkle the pork liberally with salt and pepper.
Heat the EVOO in a large Dutch oven over medium-high heat. Add the pork and cook until browned on all sides. Transfer to the oven and roast for 45 minutes. Douse the pork with the wine and roast until a thermometer inserted into the center of the pork registers 165°F, 20-30 minutes more. Transfer the pork to a cutting board and let rest for 15 minutes.
Meanwhile, bring a large pot of water to a boil for the kale. Bring the stock and milk to a low boil in another pot for the polenta. Cook the kale for 7-8 minutes, then remove to a platter using tongs. Drizzle with EVOO and lemon juice and season with salt, pepper and a little nutmeg.
Whisk the polenta into the stock mixture and cook, whisking, until thick, 2-3 minutes. Season with salt and pepper. Stir in the butter followed by the cheese, then remove from the heat.
Slice the pork and serve with the polenta and kale.
Cook’s Note: The roasted pork can be covered and refrigerated for a make-ahead meal. Bring to room temperature, then reheat in a 325°F oven, covered, for 15 minutes, adding 1 cup chicken stock to the pot to keep it moist. Uncover and heat for 15-20 minutes more. You can prep the kale ahead of time and store it in a paper towel-lined plastic bag in the refrigerator.