Heat the instant pot in the saute mode.
Once it says "Hot", add the oil.
Let the oil become hot, add cumin and wait for it to splutter.
Add the Onion and ginger garlic paste. Saute till they start turning brown- about 4-5 minutes.
Add the Chopped tomato along with its juices and saute till mushy.Press the tomatoes from the back of the spoon to make it cook faster.Take about 3-4 minutes.
Add all the remaining spices- turmeric, chilli powder, coriander powder along with salt.Cancel Saute.
Add ¼ Cup water and deglaze the pot very well.This is the most important step, if not done, the instant pot will show the burn sign.
Add the potatoes and cauliflower on top.Close the lid.
Select PRESSURE COOK, on HIGH pressure , for 2 minutes.Quick Release the pressure.
Open the pot, garnish with coriander leaves and serve hot.