Rub roast with Sea Salt & Herb Seasoning. Place in a 3-quart or larger slow cooker. Top with onions, mushrooms and Merlot & Mushroom Slow Cooker Sauce. Cook on low 6-8 hours or until beef is fork tender and shreds easily. Shred beef and place back in sauce. Serve beef on buns with cheese slices. Makes 6-8 servings.
Make ahead & freeze
Place seasoned roast and onions in a gallon resealable freezer bag. Label and freeze. Thaw and prepare as directed above.