This recipe is from a friend of mine at work, and it is very good.
Combine vegetable oil, 2 tablespoons mustard, 1/2 teaspoon salt, and black pepper. Marinate pork in this mixture for up to 8 hours.
Cook pork for 15 minutes at 450 degrees, baste/brush with some of the white wine, and then continue cooking for another 15 minutes at 400 degrees.
While pork is cooking, make sauce as follows. Heat (stirring with a wire whisk) cream on medium heat until reduced (about 20 minutes, until thick). Stir in wine, 1/4 cup mustard, 1/4 teaspoon salt, and white pepper. Cook for 2 - 3 more minutes, and serve over pork.
Serve with either mashed or roasted potatoes, steamed apples and green beans. Use extra sauce as gravy over potatoes too.