Rinse greens well to remove dirt if any. Transfer spinach to a wide container, add very little water and a pinch of salt. Boil for 2-3 minutes in medium flame. Cool down and transfer it to a mixer along with green chilies.
Grind it to a fine paste, set aside. Pressure cook potatoes(with skin) for 5 whistles or .until soft, Peel off the skin and chop into bite sized cubes. Toast it in 2 teaspoon oil till golden brown.
Drain in tissue paper and Set aside. You can alternatively deep fry the potatoes too. Heat oil in a pan, add jeera allow it to splutter. Then ginger garlic paste, fry for 2 minutes then add onion. Saute till golden brown.
Add tomato puree, spice powders and saute till raw smell completely leaves. Then add palak puree and required salt.
Bring to a boil and cook till it slightly changes color. Add toasted potato, give a quick stir allow it to blend well with the gravy. Add ¼ cup water / milk if its too thick, cook till it becomes to gravy consistency. Finally add cream / milk give a quick stir and switch off.
Serve hot with any mild pulao or hot phulkas.