1. Trim fat from roast. 2. If necessary, cut roast to fit into a 3 1/2 to 6 quart crockpot. 3. In a large skillet brown meat on all sides in hot oil. 4. drain off fat. 5. Transfer meat to crockpot. 6. Clean mushrooms; remove and discard stems. 7. Cut mushrooms into 1/4 inch slices. 8. Add to crockpot. 9. Pour broth over meat and mushrooms. 10. Cover and cook on low-heat setting for 8 to 9 hours or on high heat setting for 4 to 4 1/2 hours. 11. Remove meat from crockpot; cover and let stand for 10 minutes. 12. Meanwhile, using a slotted spoon, remove mushrooms and set aside. 13. Thinly slice meat. 14. Arrange meat, mushroom slices, and onion slices on toasted buns. 15. Pour cooking juices into a measuring cup; skim off fat. 16. Drizzle a little of the juices onto each sandwich and pour the remaining juices into bowls to serve with the sandwiches for dipping. ---------------------------------------------------------------------------
Nutrition
Ingredients