Crock Pot Steak and Gravy

2-2-1/2 lbs round steak
1 pkg. onion soup mix
1/2 cup water
1 tsp sage
1 (10.5 oz) can cream of mushroom soup
1 lb fresh mushrooms, sliced

Cut steak into serving size pieces. Place in cooker. Add soup mix, water, sage and soup. Cover and cook on low for 6-8 hours. Add mushrooms and cook for 10-15 minutes longer, or until mushrooms are done. Serve with mashed potatoes, rice or noodles.