Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  10      pounds        round or rump roast
   1      tablespoon    oregano
     1/2  cup           vinegar
   1      small         onion -- diced
   2      tablespoons   worcestershire sauce
                        salt
  10      milliliters   garlic -- minced
                        pepper
                        ***SAUCE***
   7 3/4  cups          water
   1      package       italian dressing mix
   3                    beef bouillon cubes
   2      teaspoons     basil
   8      tablespoons   worcestershire sauce
   1      package       au jus mix
   4      teaspoons     oregano

Preparation:

Mix vinegar,2 tbsp. Worcestershire sauce,1 tbsp. oregano and the garlic. Pour over seasoned meat,slicing onion on top.Cover lightly; roast @ 350 degrees 3 hours or until done.Slice when cool. Before serving,combine sauce ingredients;bring to boil.Cool 10 minutes,then add sliced beef.Serve on poorboy buns.May be refrigerated 2 to 3 weeks.Makes 10 to 16 servings.