I prefer to soak the beans separately. You can soak them mixed in one bowl. Add enough warm water to soak the beans. I used 3 cups in total.
Or follow the rule of water being 3 inches above the level of the beans.
Cover the bowl/bowls with lid/lids.
Soak the beans for 6-8 hours or overnight. I prefer overnight.
Using a colander drain out the soaking water from the beans.
Wash the beans under running water.
Add the beans to the pressure cooker or the inner pot of the Instant Pot.
Add about 500-600 ml fresh water.
Add salt.
If you are using the pressure cooker, cook the beans over medium heat for 3 whistles. Allow the pressure to reduce naturally before opening the lid.
If you are using an Instant Pot, then click the pressure cook button on. The setting should be normal low and for 10-12 minutes. Usually in 10 minutes the beans get cooked perfectly. Allow the pressure to reduce naturally before opening the lid.
Drain the cooked beans in a colander. Save the water in which the beans have been cooked (bean broth) for soups, stews or dals.
Allow the beans to cool down completely.
We need only 3 cups of cooked beans . But if you are making for more than 4 servings then use all the beans.
I store the remaining cooked beans in the fridge for 2 days or for 3 months in the freezer.