Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      pounds        lean ground beef
   2      medium        onions -- finely chopped
   2      tablespoons   chili powder
   1      teaspoon      leaf oregano
   1      teaspoon      paprika
   2      teaspoons     salt
     1/3  cup           taco sauce
   1      tablespoon    Worcestershire sauce
   1      can           pinto beans or green peas -- drained and pureed
                        taco shells
                        shredded lettuce -- for accompaniment
                        diced avocado or guacamole -- for accompaniment
                        diced tomato -- for accompaniment
                        shredded cheddar cheese -- for accompaniment
                        sour cream -- for accompaniment

Preparation:

In large skillet, brown ground beef and onions; drain well. Place beef and onions in crock pot. Stir in remaining ingredients except taco shells and items for accompaniment. Cover and cook on low setting for 8 to 10 hours. Taste for seasoning. Fill taco shells with 2 tablespoons meat mixture, add shredded lettuce, guacamole, tomato, shredded cheese, top with a dollop of sour cream.