Sloppy joes recipe in the crockpot category

3 pounds ground beef

2 tablespoons shortening

1 cup onion, chopped

1 cup celery, diced

1 each green pepper, chopped

1 each garlic clove, minced

2 tablespoons worcestershire sauce

1 cup catsup

3 each beef bouillon cubes, crushed

1/2 teaspoon paprika

1/4 teaspoon pepper

1 can tomato paste,

6 oz.

1 1/4 cups water

3 tablespoons vinegar

3 teaspoons brown sugar

1 teaspoon dry mustard