Switch on the Instant Pot on Saute mode for 10 minutes.
Add Butter to the inner of the Instant Pot.
4 tablespoon butter
Once it has melted add the chopped leek. Be careful that the butter should not burn.
3 Leek stem
Saute this leek until translucent.
Now add in the diced potatoes.
2 medium-size Russet / Rooster potato
Add 3 cups of water, salt and give it a nice mix.
Cancel the Saute mode, close the lid of the Instant Pot.
Pressure cook on high for 5 minutes.
Once done, let the pressure release naturally.
Open the lid of the instant pot once the pin has dropped.
Using an immersion blender, blend it to a smooth consistency.
Add black pepper and saute it for 5 minutes on sautee mode.
Switch off and serve hot with a garnish of chives and sour cream.