Remove the hard stem of fenugreek,use only the leaves and tender stems.
Wash them well with water and then chop finely.
Scrub and wash potatoes and chop into cubes(peeling the potato skin is optional)
Heat oil in a heavy bottom pan or a nonstick pan and add cumin seeds,when seed start crackling add chopped green chilies.saute for few seconds.
Add turmeric, chopped potatoes and salt,mix well and cover and cook on low heat for approx 2-3 minutes or till half done.(no need to add water for cooking,potato will cook in the steam)
Now add chopped fenugreek and tomatoes.mix well,cover and cook on low heat.
Keep stirring in between 2-3 times.so it will not burn or stick in the bottom of the pan.
When almost done ,add chili powder and mango powder,mix gently.
Cover and simmer for a minute.
Serve hot with rice or roti or can also stuff in the sandwiches and roll