Slow Cooker Swiss Steak. The original 1974 [not 1975] Rival Crock-Pot recipes called for 2-2/12 lbs. of round steak, a package of onion soup mix, 2 large cans of crushed tomatoes, and 2 cups of water. 8 hours on low. For a brown instead of red steak, substitute cream of mushroom soup for the tomatoes and a package of brown gravy mix for the onion soup mix. Both are easy and excellent. The 1975 Rival Crock- Pot version is totally different with carrots and celery and no soup mix.