In a large pot or bowl, submerge the beans completely with water (at least 2 to 3 inches covered). Cover the bowl with a clean kitchen towel or the pot with its lid, then soak overnight or until ready to attend to them the next day.
2 pounds extra large dried lupini beans, Water
When ready to cook, rinse the beans, and remove any brown-colored ones.
Place the lupini beans in a large pot and cover them again with enough water.
Add 4 to 5 tablespoons of salt.
Salt
Cover the pot and place it on high heat to bring the water to a boil.
Then immediately lower the heat to maintain a very gentle, almost bare simmer for 2 ½ hours. The beans will be softer and brighter in color but still have a firmness to them.
Drain the beans and rinse under cold running water.
Place the beans in a clean pot and submerge again with water, enough to cover them completely. Add salt (optional)—one tablespoon per quart/liter of water.
Cover the pot and soak the beans for 4 to 7 days, stored in a cool dark place.
During those days, drain and rinse the beans twice a day, each time placing them in a clean pot, covering the beans again with new water, and adding salt.
After 4 to 5 days, taste a lupini bean without swallowing. If still bitter, continue the rinsing-salting process until the bitterness is gone.
Store the beans in a jar covered with lightly salted water in the refrigerator for up to two weeks..
Vacuum seal the beans for a longer shelf-life.