In a pressure cooker, heat the oil then add the veggies, ginger, garlic, salt, chilli powder and pav bhaji masala.
Cook for 2 to 3 whistles
While the bhaji is cooking, heat a non stick, reduce the heat, half the pav spread some butter on both the sides, put on the pan butter side down till nicely crisp and brown.
Back to the bhaji, once the veggies are done, mash them well
Serve hot with a dollop of butter, finely chopped coriander leaves and crisp pav.