Mix all of the above ingredients (except beans) together. Put into a saucepan and simmer until onions are tender. Be sure to stir often. (This will NOT be the same without their sauce. Perhaps try ordering it online).
Open beans and pour off the excess liquid from beans. Add beans to the above sauce.
Put into a 325-degree oven and bake for about 1 to 1 ½ hours. (You could instead, put into your smoker at low heat for 2 to 3 hours while smoking your favorite meat.}.