Remove debris and rinse the dry kidney beans. Place beans in a large bowl and cover with at least 3–4 inches of fresh water. Soak overnight or for at least 8 hours.
After soaking, drain and rinse the beans well.
Instant Pot / Pressure cooker method: Place soaked beans in the pot, add fresh water so beans are covered by about 1–2 inches, and pressure cook on high for 15 minutes. Let natural release for 10 minutes, then quick release. Test a bean; it should be tender. Add salt to taste after cooking.
Stovetop method: Place soaked beans in a large pot, cover with fresh water (1–2 inches above beans), bring to a boil for 5 minutes, skim any foam. Lower heat, cover, and simmer 60–90 minutes until tender. Add salt in the last 10–15 minutes of cooking.
Drain or keep in a small amount of cooking liquid (depending on whether you want them dry or soupy). Use in stews, pottage, or serve with sauces like my Creamy Fish Sauce.