Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      pound         ground beef
   1      small         onion -- chopped
   2      teaspoons     chili powder
     1/2  teaspoon      leaf oregano
     1/2  teaspoon      paprika
     1/2  teaspoon      salt
   2      tablespoons   taco seasoning mix
   1 1/2  teaspoons     worchestershire sauce
   1      can           (8 oz) tomoato sauce
  10                    taco shells -- (up to 12)
                        taco sauce
                        shredded lettuce

Preparation:

Brown beef and drain well; place in crock. Add remaining ingredients exc ept taco shells, taco sauce and lettuce. Cover and cook 8-10 hours. Fill taco shells, top with sauce and shredded lettuce.