Cranberry Pork Tenderloin

adapted from allrecipes.com

2 lbs. pork tenderloin
1/2 onion, sliced or diced
1/3 c French dressing
1 can cranberry sauce
1-2 tbsp flour

Place onion in the bottom of a crockpot. Place pork on top. Mix together dressing and cranberry sauce. Pour over pork. Cook on low 8 hours. Remove pork. Whisk flour into sauce in crockpot. Return pork to crockpot. Serve over rice.