Soak beans overnight in water to cover. Drain beans and set aside.
In a large bowl, combine mustard, pepper, ginger, vinegars, and coffee. Add maple syrup and molasses and mix well. Add the onion and pork. Pour in the bourbon and stir in the beans.
Transfer beans to an ovenproof baking dish. Bake for 9 hours in a preheated 250 degree oven, stirring several times in the baking process. If needed, add a little water so beans don't dry out. Serves 8-10.
Recipe by The Culinary Cellar at https://theculinarycellar.com/heart-new-england/