Preheat oven to 350°F. Place pork chop on a plate; pierce with a fork at 1/4-inch intervals. Flip pork, and pierce opposite side. Press salt and peppercorn blend evenly onto both sides.
Heat oil in a 10-inch ovenproof skillet over high. Add pork chop; cook until browned, about 3 minutes per side. Transfer skillet with pork to preheated oven. Roast until a thermometer inserted in thickest portion of meat registers 130°F, about 10 minutes.
Remove skillet from oven; transfer pork to a plate or carving board. Return skillet to heat over medium; add 1 tablespoon butter, and let melt. Add shallot; cook, stirring occasionally, until aromatic and translucent, about 1 minute. Add Dynasty Premium Oyster Flavored Sauce, cook for about a minute. Add wine; bring to a simmer over medium. Simmer, undisturbed, until reduced by half, about 3 minutes. Add remaining 2 tablespoons butter; remove from heat, and swirl skillet until butter is melted and emulsified into sauce. Carve pork; serve with sauce and mashed potatoes
