Pork Tenderloin with Balsamic-Cranberry Sauce

1 1/2 tsp butter
8-10 oz. pork tenderloin
1/2 cup chopped onion
1/2 tsp chopped fresh rosemary
1/2 cup chicken broth
1/3 cup cranberry whole sauce
1 tbsp. balsamic vinegar

Preheat oven to 450 degrees.Melt butter in heavy large oven proof skillet over medium heat.Sprinkle pork with salt and pepper.Sear pork on all sides. Place skillet with pork in oven.Roast until thermometer inserted into center registers,about10 minutes.Remove and place tin foil over meat and let it rest,
Melt remaining tsp.butter in heavy medium skillet over medium high heat.Add onion and rosemary,Saute until onion softens,about 3 minutes.
Add broth,cranberry sauce and vinegar and wisk until cranberry sauce melts.
Transfer pork to work surface.Scrape any juices from skillet into cranberry sauce.Boil until sauce has reduced enough to coat spoon thickly,about 6 minutes.Season with salt and pepper.Slice pork and serve with sauce.

Serve with mashed potatoes and broccli or sauted aspargus.Not only does family enjoy this but wonderful for guest.
Enjoy!