Salpicon (mexican Shredded Beef)

Place beef in heavy pot; cover with water and add garlic, bay leaf, tomatoes, cilantro, salt and pepper. Cook over medium heat about 5 hours, or until meat pulls apart. Remove meat from broth, cool and cut into 2 inch squares. Shred with two forks or in processor with short pulses. (At this point, the meat can be used for burritos or other recipes calling for shredded beef. Also, may be frozen up to 3 months.) Arrange beef in a 9 x 11 inch glass dish. cover with salad dressing and allow to marinate in refrigerator overnight. Before serving, arrange the following in layers over beef: beans, cheese, chilies, and avocados. Decorate with parsley.