Beef Stew In A Crockpot 2 pounds roast beef, cut up 2 large carrots, sliced 3 potatoes, chopped Onion to taste 5 ounces peas Salt and pepper to taste 1 (10.75 ounce) can cream of mushroom soup Place all ingredients into crockpot. Cover. Cook on high for 4 hours, stirring occasionally.