Heat olive oil in a large skillet over medium heat. Add the pork loin and season with salt and pepper. Cook, turning frequently, until golden brown on all sides, about 8 minutes.
Add the onion, bell pepper, garlic, oregano, thyme, rosemary, and smoked paprika to the skillet and cook until vegetables are softened, about 5 minutes.
Stir in the parsley, Parmesan cheese, and white wine. Cook until the wine is reduced and the mixture is thick, about 3 minutes.
Remove the skillet from the heat and let cool slightly. Spread the stuffing evenly over the pork loin and secure with kitchen twine. Place the pork loin in a roasting pan.
Bake the pork loin in the preheated oven for 25-30 minutes, or until the internal temperature reaches 145 degrees F.
Remove the pork loin from the oven and let rest for 10 minutes before slicing.
Heat the butter in the same skillet over medium heat. Add the pork slices and cook until golden brown, about 2 minutes per side.
Serve pork slices with the stuffing on the side.
Interesting Facts
Pork loin is a great source of protein and is low in fat.
Smoked paprika adds a smoky flavor to the stuffing.
This dish is a great way to use up leftover vegetables.