Wash beans thoroughly.  Place in a large kettle.  Cover with water. 
Add 2 tablespoon salt.  Soak overnight. 
Saran in margarine, then add 2 quarts water and ham or ham hock (optional). 
Simmer 2 1/2 to 3 hours. 
Add the following:
1 large onion, chopped;
1 large can of tomatoes,
1 teaspoon chili powder,
1 clove garlic, chopped;
juice of lemon, salt and pepper to taste. 
Simmer for 1/2 hour. 
Makes 4-6 servings.