Heat the instant pot on saute mode. Once hot add the oil, green beans, carrot and cabbage. Saute the veggies for two minutes.
Now add the corn kernels, cream style sweet corn, 3 cups of water or vegetable broth, salt, sugar and pepper. Mix it well and press cancel.
Close the instant pot lid and adjust the valve to the sealing. Press manual or pressure cooker mode and adjust the time to 3 minutes on high pressure.
Once the timer goes off, wait at least ten minutes before opening the lid.
Now to thicken the soup, mix the corn starch in quarter cup of water and add it to the soup.
Press the saute mode and cook for couple of minutes till the soup thickens to your desired consistency.
Add the spring onion, vinegar or lemon juice and chili sauce. Serve the soup warm with a crusty bread.