Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1       medium       Onion -- chopped
     1/4   cup          Green pepper -- chopped
   4       cups         water; divided
  15       Ounces       Great Northern beans -- rinsed and drained 
  15       Ounces       Navy beans -- rinsed and drained
   6       Ounces       Salt-free tomato sauce
  14 1/2   Ounces       Low-salt diced tomatoes undrained
   2       Teaspoon     Chili powder, or to taste
   1       Teaspoon     Salt (optional)
     1/2   Teaspoon     Pepper

Preparation:

In a large saucepan, cook the onion and green pepper in 1/2 cup water until tender. Add beans, tomato paste and tomatoes. Stir in chili powder, salt if desired, pepper and remaining water; bring to a boil. Reduce heat; cover and simmer for 20 minutes.