Clean, peel and dice your onion, leeks, potatoes and neeps. Making sure that the neeps and potatoes are of a similar medium cube.
Place in the instant pot, set it to sauté and add the extra virgin olive oil. Cook for a couple of minutes or until the onions are slightly browned.
Turn the sauté off.
Mix in the thyme, salt, pepper, along with 360ml of stock.
Place the haddock on top and place the lid on the instant pot. Set the valve to sealing and cook for 8 minutes on manual/pressure cook.
Manually release pressure (QPR) as soon as it beeps.
Remove the haddock with a spatula and put to one side.
Add in the thyme and milk and blend using a hand blender.
Break up the haddock in your hands and sprinkle most of it into the instant pot and mix. It will create some nice lumps and fine lumps and add to the taste and texture.
Finally serve in bowls with the rest of the haddock sprinkled on top and with some air fried neeps.