Crock Pot Swiss Steak Sandwiches
This makes very tender swiss steak that becomes like shredded beef.

2 lb swiss steak
1 TB vegetable oil
1/2 C chopped celery, opt
1/2 C chopped onion
3/4 C beef broth
1/2 C tomato sauce
1/4 C water
1/4 C sugar
2 TB onion soup mix
1 TB vinegar
12 hamburger buns, split

In a large skillet, brown the steak on all sides in oil. Transfer to crock pot. In the same skillet, saute celery and onion for 1 minute. Gradually add broth, tomato sauce, and water, stir to lossen the brown bits. Add sugar, soup mix and vinegar; bring to a boil. Pour over steak cover and cook for 7-8 hrs on low, or till meat is tender. Skim fat from top. Serve meat in buns with cooking juices.