Season pork with salt and pepper. Coat in flour; shake off excess. Melt 2 tbls butter in heavy skillet over medium-high heat. Add onion and garlic and saute until golden brown, about 5 minutes. Transfer mixture to bowl. Melt remaining 2 tbls butter in same skillet over medium-high heat. Add pork and saute about 4 minutes per side. Transfer pork to plate; tent with foil to keep warm. Add onion mixture, wine, green peppercorns and herbs to same skillet and boil until sauce thickens, about 4 minutes. Add pork to skillet and heat through. Divide pork among plates. Add 1/4 cup chilled butter to sauce in skillet and whisk just until melted. Mix in pine nuts. Spoon sauce over pork and serve. ----