Soak the beans overnight in plenty of tap water. Or, you can bring them to a boil on the stove and then turn them off, cover them and let them sit for an hour or two.
Another way to cook this, is to use a crock pot. Boil the soaked beans for half an hour, as directed above. Then, instead of combining everything in a casserole, combine them in 2 crock pots instead. Put the lid on the Crock Pot after you’ve mixed everything up in it, and cook it on High for about 3 or 4 hours, or on low for 6 or 8 hours.