Now add cooking oil in the wok. Add mustard seeds and when mustard seeds splutter add asafoetida and saute for 1 minute. Add onion and cook till onion gets translucent. Add curry leaves and saute for 30 seconds. Add chopped potatoes, green chilli and peas. Cover the lid and Cook for 5 minutes or till veggies are soft. Now add salt, red chilli powder, turmeric powder magic masala and mix thoroughly.