First boil the spinach and mustard if using. Keep it aside to cool. Once it cools down, using a blender puree spinach into a smooth paste.
Then in a kadhai or flat bottom pan, heat the oil. Add chopped or sliced onions and sauté it until brown. If using store bought fried onions, you can add it instead.
Then add ginger & garlic paste and green chillies to it and sauté for another couple of minutes. Let the onions cool down. Blend it in the blender with the tomato puree and put it back in the kadhai or pan. Stir for a few minutes so that the tomato is cooked and the raw smell is gone.
At this time you can add all the spices, which is salt, turmeric, red chili powder, garam masala to the mixture. Also add the pureed spinach and mix everything well. Cook it covered on a slow heat for about 30 to 45 minutes. If the spinach and the onion mixture mixed together looks thick then you can add a a little water to it.
The longer the spinach is cooked, the better it is. You can also cook it in a slow cooker. Make sure you check all the spices. Add paneer cubes towards the last 10 mins so it can be cooked in it for a good few minutes so all the flavors can marry.
In a small pan, add ghee and let it heat up. Add roughly chopped garlic with dry red chilies. Saute till the garlic is slightly brown. Add a teaspoon of paprika and turn the heat off. Now pour the mixture on top of the palak paneer.
Serve it hot and enjoy this delicious Palak Paneer with your choice of roti, naan or a paratha.
Keyword gluten free, indian, main dish, north indian, palak, paneer, spinach, vegetarian