Pressure cook Potatoes in salted water. Peel the boiled potatoes and keep aside.
Heat two tablespoons of oil in a a large pan.
Add cumin seeds, mustard seeds, hing (asafoetida) and 2-3 dry red chillies in the pan.
Mix the spices and add ¼ cup of chopped red onions, chopped green chillies grated ginger in them.
Saute the onion until the color of the onion turns light pink.
When the onion turns slightly pink, reduce the heat to slow and add turmeric powder in it. Then add red chilli powder, coriander powder, salt to taste. Add cumin powder and mix the onions along with the spices.
After 1 minute add 3-4 tablespoons of water in the pan and mix all the ingredients together.
Cut the boiled potatoes into two halfs.
Add the boiled potatoes in the pan and cook the dish for 4-5 minutes.
Turn off the heat, garnish with chopped fresh coriander leaves and your Chatpate Masala Aloo or Bombay potato is ready.
Serve it as potato sabji or snack.