Green Bean Sweetened Soup

Put soaked beans and kelp in a pressure cooker and top with enough water to reach to 1/2 of the 6 quarts pr essure cooker. Close the lid and cook on high - 15 lbs pressure for 30 minutes - time starts when the 15 lbs of pressure has been reached, that is the pot will be hissing like crazy. Reduce heat to maintain 15lbs pressure. Release pressure before opening the lid. Check the beans for desired softness (cook further if it is not ready). Add enough of sugar according to taste and bring the soup back to the boil and cook until sugar has dissolved. Enjoy