Sunday Beef Roast
["2 to 4 lb. chuck roast", "salt to taste", "pepper to taste", "1 onion, sliced", "1 can cream of mushroom soup", "1 small can sliced mushrooms (optional)"]
["Season roast with salt and pepper and place in slow cooker. Add onion and mushrooms. Add soup. Cover and cook on low 8 to 10 hours or high for 6 hours."]
["chuck roast", "salt", "pepper", "onion", "cream of mushroom soup", "mushrooms"]