I think I found the recipe you are referring to. It has all ingredients that you listed, I hope it is the right one!
Harvest Pork Roast with Gravy
Prep Time: 10 Minutes
Total: 10 Hours 10 Minutes
3-pound pork boneless shoulder roast
1 package (8 ounces) fresh mushrooms, cut in half
1 medium onion, cut into 8 wedges
1 jar (12 ounces) home-style pork gravy
1 can (6 ounces) tomato paste with Italian seasonings
1. Spray 12-inch nonstick skillet with cooking spray. If pork roast comes in netting or is tied, do not remove. Cook pork in skillet over medium-high heat 5 to 6 minutes, turning occasionally, until brown on all sides.
2. Spray 5- to 6-quart slow cooker with cooking spray. Place pork in cooker. Arrange mushrooms and onion around pork. Mix gravy and tomato paste in small bowl; pour over pork and vegetables.
3. Cover and cook on Low heat setting 8 to 10 hours.
4. Place pork on cutting board; remove netting or strings. Stir gravy in cooker; serve with pork.
Answered 03/24/2013 by Betty Kitchen Expert