Start you InstantPot or Multipot on saute mode and once hot, add oil and mustard seeds.
Once the seeds begin to splutter add the cumin seeds, asafoetida, green chillies, curry leaves and turmeric powder. Give a quick stir.
Add the diced potatoes, peas, cabbage, finely chopped coriander stems (optional) (reserve the leaves for garnishing later), salt, sugar and 1/4 cup of water. Mix everything so that all is well Incorporated.
Close the lid with Vent to sealing position and cook on Manual/pressure cook setting for 1 min on High Pressure followed by Quick Release.
If there is water remaining after opening, you can switch the Saute mode on and cook until the water evaporates.
Add lemon juice and coriander leaves and give a final stir.
Cabbage, Potato and Peas Stir Fry - Kobichi Bhaji is ready to serve!!