Firstly, chop all the veggies like onion, carrot, capsicum, cauliflower, baby corn, beans into small pieces and set them aside. Also, chop the paneer into small cubes.
Heat oil in a pan. Add asafoetida, cumin seeds and mustard seeds. Let them splutter for a minute. Now add chopped onion and saute them for a few minutes until they turn golden. Now add all the veggies like carrot, capsicum, cauliflower, baby corn, beans and peas.
Add salt, red chilli powder, dry mango powder, coriander powder, turmeric and give a nice mix. Now add 1/4 cup water. This will prevent the veggies from becoming too dry and will produce steam which will quickly cook the veggies. Cover the pan with a lid for 6-8 minutes.