Heat a pan and add 3-4 tbsp mustard oil.
Add 1 tsp cumin seeds and let it splutter.
Add 2 medium sized onions and fry for just half to one minute on medium flame.
Add 4 medium sized potatoes cut into big pieces, 2-3 finely chopped green chilies, 1 tsp salt, and 2 whole green chilies.
Turn the flame on low to medium and cover it. Cook for 8-10 minutes.
Remove the lid every 2-3 minutes and stir the contents.
Add 1 tsp turmeric powder, 1 tsp red chili powder, 1 tsp Kashmiri red chili powder, 1 tsp coriander powder, and 1 tsp cumin powder.
Add 1.5 tsp salt as per taste.
Cover it again and cook on low flame for 2 more minutes.
Add 1 medium size tomato roughly chopped.
Mix everything well and cover it again. Cook for another 7-8 minutes or until the capsicum is slightly crunchy.
Add 1.5 tsp garam masala and mix well.