Turn on the Instant pot in saute mode. Add vegan butter to it. Once the pot beeps, add cumin seeds, ginger, garlic, onions, and serrano peppers. Saute for 30 seconds.
Then add the roughly chopped tomatoes along with salt. Cook till they turn mushy and soft.
Add the veggies like beets, carrots, green peas, and green beans. Mix and cook for 30 seconds.
Then add the remaining veggies like cauliflower and potatoes along with salt and turmeric powder. Add vegetable stock or water and give it all a good mix.
Cancel the saute mode and close the instant pot with its lid. Cook in manual mode for 6 minutes with the valve in seal position.
Release pressure manually when it beeps and open the lid. Mash this mixture coarse using a potato masher or an Immersion Blender.
Turn on the saute mode and add crumbled tofu, pav bhaji masala, chilly powder, and salt if needed.
Before serving, garnish it with lots of chopped cilantro, and onions along with some lemon juice.