In the same pan that you previously used, heat a tsp of oil. Add 1-inch cinnamon broken to pieces, 1 clove, 1 cardamom, and roast these in low flame until they turn aromatic.
Now add the chopped garlic and ginger. Saute them until they turn slightly brown and the raw smell is gone. Alternatively, you can 1 tsp readymade ginger garlic paste.
Next, add the chopped onion and cook until it turns soft and translucent.And then add the chopped tomatoes and cook them until they turn soft and mushy, you can add some salt here. Let them all cool down. If you have forgotten to soak cashews previously, soak them now in hot water for 10 minutes until they are soft.
The tomato-onion mixture in the pan would have cooled down by now. Transfer it to a large mixer jar. Drain the water from the soaked cashews, and add them also to the jar. Add 1/4 cup water and blend to a smooth paste.
Since I wanted the gravy to get an orangish color, I had previously soaked about 2 Kashmiri red chilies in hot water for 5 minutes. I added them to the mixer jar and blended the mixture again.
Again heat oil in the deep bottom pan. Add 1 large or 3 small bay leaves and 1/2 teaspoon cumin seeds (skip if you have used while frying potatoes).
Reduce the heat to low and transfer the blended mixture to the pan. It will start spluttering if the pan is hot, so be careful.
Add the dry spices- 1 teaspoon cumin powder, 1 teaspoon coriander powder, and mix well.If you have not used Kashmiri red chilies while blending, you can use 1/2 teaspoon Kashmiri red chili powder here. Simmer this masala in low-medium heat by stirring often, until it gets thicker and creamier.It can take about 10 minutes. Once it has simmered well, add 3 tablespoons whisked curd, 3/4 teaspoon garam masala, 1 teaspoon salt. Mix everything well.
Then add 2 teaspoons crushed Kasuri methi and finally add the potatoes you had initially pan-fried.
Simmer this in low-medium heat by closing the lid (dum cooking) for another 10 minutes at least.
The potatoes would have absorbed all the flavors and you will notice the oil would have separated. This is now done. Switch off the heat. Serve Dum Aloo with any Indian flatbread like Roti or Chapati, Naan, Kulcha, Paratha, or also with steamed rice or jeera rice (cumin rice).