Place the stainless steel inner pot inside the Instant Pot® and add the olive oil, green onion, broccoli, and zucchini. Press Saute, pressure level High, for 5 Minutes. Stir constantly to prevent burning.
Add the lentils, water, salt, and garlic powder. Stir. Close and lock the Instant Pot® lid. Make sure the steam release handle is turned to Sealing. Press Pressure Cook, pressure level Medium, and set time to 1 Minute.
When done cooking, press Cancel. Then turn the steam release handle to Venting. Once all steam has been released, open the lid.