In the inner pot of instant pot combine all the ingredients for the soup (except coconut milk and lemon juice). Stir and plug in. Close the lid and seal the valve. Pressure cook manual at high for 10 minutes. Once done release the pressure and open the lid.
Stir it again, add coconut milk and lemon juice. Mix it well. (You may remove the sliced lemon grass before serving if desired). Let it settle for 2 minutes.
Ladle it in the serving bowls and garnish with cilantro and more green onions and a lime wedge. Enjoy it warm.
