Optional - Dry Bread Cubes: Place bread cubes in an air fryer basket or oven tray. Place the air fryer lid on Instant Pot Duo Crisp. Press "Air Fry" button, set the temperature to 275°F and cooking time to 45 minutes. Give the bread cubes a few shakes halfway through. *Oven Method: use the same temperature and cooking time. Saute Onions & Make Egg Mixture: Press "Saute" button to "Sauté More" function to heat up Instant Pot. Wait until it says "HOT" (~8 mins). Add 3 tbsp unsalted butter (45g) in Instant Pot, and ensure the whole bottom is coated with butter. Add in diced onions, and saute for 3 minutes. While the onions are sauteing, beat 2 eggs in a large mixing bowl. Add 2 tbsp (7.5g) finely chopped parsley and 1 cup (250ml) unsalted turkey broth into the beaten eggs.
Saute Celery & Garlic: Add diced celery, ½ tsp (0.9g) ground sage, ½ tsp (0.5g) dried thyme, and ¼ tsp (0.4g) dried rosemary in Instant Pot, then saute for 1½ minute. Add in minced garlic, and saute for 30 seconds.
Deglaze Instant Pot: Pour 1.5 - 2 cups (375ml - 500ml) unsalted turkey broth in Instant Pot. Deglaze by scrubbing all the bits off the pot bottom. Add 1 tbsp (15ml) regular soy sauce in Instant Pot, and give it a quick mix. Turn off the heat. Taste and season with salt & black pepper (for reference, we used 2 large pinches of kosher salt).
Combine Everything: Slowly pour the seasoned celery onion mixture into the egg mixture, then give it a quick mix. Gently fold in the dried bread cubes, and make sure the bread cubes absorb all the stock mixture. Place everything in a cake pan.
Pressure Cook Stuffing: Clean and dry the inner pot. Add 1 cup (250ml) cold water, and a trivet in Instant Pot. Place the cake pan with stuffing on the trivet. Close lid, then turn Venting Knob to Sealing position. Pressure Cook at High Pressure for 12 minutes + 10 minutes Natural Release. Open the lid carefully. Optional - Golden Brown Stuffing: Place the air fryer lid on Instant Pot Duo Crisp. Press "Air Fry" button, set the temperature to 400°F and cooking time to 8 minutes. *Pro Tip: It will take roughly 6 - 8 minutes + preheat time. You can open the lid to check the progress. *Oven Method: Place the cake pan on top rack of the oven, then use the broil function for a few minutes.
Serve: Garnish stuffing with finely chopped parsley, then serve immediately. Enjoy your wonderful Thanksgiving or Christmas feast! :)