Heat a pan, add oil, cumin seeds. Add finely chopped onions and sauté. Cook until the onions are translucent.
Next add ginger garlic paste, sauté for 1-2 mins until the raw smell goes off.
Add finely chopped tomatoes and sauté. Cover and cook until the tomatoes are mushy.
Add Spices (Kashmiri red chili, turmeric and garam masala) and salt to taste.
Mix well, cook for 1-2 mins on low flame.
Add boiled, peeled and cubed / diced potatoes. Mix well until the onion-tomato curry base coats the potatoes.
To this, add spinach puree, mix and adjust seasoning (salt or spices, if required). Cook for 1-2 mins on low heat.
Drizzle with cashew cream (optional). Mix, switch off heat and serve.