Heat oil and add chopped potatoes.
Roast on high heat until potatoes turn slightly brown and almost 60-70% cooked.
Remove the potatoes.
Add chopped capsicum in the same oil.
Saute for couple of minutes until you see some light brown spots on it and it is 50% cooked.
Remove the capsicum too.
Then add cumin seeds, coriander seeds and asafoetida in the same oil. Let cumin splutter.
Add onion. Let onion turn translucent. Do not let the onion loose it's crunch.
Add tomatoes, ginger and green chilies in a grinder jar.
Grind to a fine paste and add this paste in the pan.
Then add salt, turmeric powder and kashmiri red chilli powder. Mix.
Put a lid and let tomatoes cook. Keep stirring at intervals to prevent tomatoes from sticking at the bottom.
When oil is seen separating, its a sign that tomatoes are thoroughly cooked.
Add fried potatoes and capsicum. Also sprinkle dash of water.
Put a lid and let them cook for 8-10 minutes or until both potatoes and capsicum have turned soft enough to eat.
Lastly add kasuri methi, garam masala, dry mango powder and coriander leaves. Mix well.
Enjoy.