Slow Cooker Ground Beef Casserole

1 ½ lbs. ground beef, cooked

3 potatoes, thinly sliced

1 medium onion, thinly sliced

3 carrots, thinly sliced

1 celery stalk, thinly sliced

Salt & pepper to taste

2 tsp. beef bouillon powder

½ C water

1 can tomato soup

Place the ground beef, potatoes, onion, carrots, celery, salt and pepper in the slow cooker & stir. Mix together the bouillon powder, soup and water in a bowl and pour into the slow cooker. Cover and cook on low heat for 8 – 10 hours or on high for 4 – 5 hours.