In the Instant Pot, place the steamer rack and put 1 ½ cups (360 ml) water.
Cut the green onions to separate the green part and white part (we don’t need in this recipe, but you can make Shiraga Negi for garnish). Cut green part into 2-3 pieces. Cut the ginger into thin slices, keeping the skin on.
Cut the pork collar in half and place it in the heat-resistant container (I use a Pyrex glass container) and place on top of the steamer rack.
Put green onions and ginger, and pour sake over the pork. Sake removes the unwanted smell from the meat and adds umami and flavors.
Cover and lock the lid on the pressure cooker. Make sure the steam release handle points at “sealing” and not “venting”. Press the “Steam” button on the Instant Pot to the pressure cooking steam mode. Press “plus” button to change the cooking time to 40-45 minutes (20 minutes/lb). Meanwhile, you can make two kinds of the sauce.
As soon as the cooking time has reached, you will need to use the ‘Quick Release’ method to release the pressure. When the valve goes down, you can open it and take out the steamer basket and container that has pork in it.
Transfer the pork to a dish. Save a few tablespoons of cooking liquid (in case you want to drizzle over meat or slices of meat to moisten later) and discard the green onions and ginger slices. Cover the pork with plastic wrap to keep it moist and let cool until you can touch the pork to cut into slices.
After 15 minutes or so, you can slice into thin rounds (I discarded the fat). Transfer to a serving platter and serve with the dipping sauce immediately.
To Make Garlic Soy Sauce
Combine the ingredients for Garlic Soy Sauce in a bowl or liquid measuring cup.
Cut the green onion into thin slices and add to the sauce. Add the crushed garlic (or minced garlic) to the sauce. Whisk all together and transfer to a serving bowl.
To Make Ginger Miso Sauce
Grate the ginger (I have both small and large size graters. If you get one, get a bigger one).
Combine the rest of the Ginger Miso Sauce ingredients in a bowl and whisk well. Transfer to a serving bowl.