pre heat oven 400°

Combine butter & brown sugar in bowl. Microwave until melted together (30 sec.). Stir in mustard, soy sauce & honey. Heat remaining oil in ovenproof skillit over high heat. Season salmon with salt & pepper and add to pan with flesh down. Brown one side (3 - 4 min.). Brush on half of honey mustard. Put pan in oven about 5 minutes before white foam forms on top of salmon. Remove from oven and brush with honey mustard. Serve