Into the pot, add all the bossam ingredients
2-3 lbs thick pork belly, 1 tsp black peppercorns, 4-6 slices of ginger, 1 onion, peeled and chopped in half, 7-10 cloves garlic, peeled, 3 bay leaves, 2 tbsp dwenjang or Korean fermented soy bean paste, 1 tsp ground coffee, 3 green onions, roughly chopped, 10 cups water