Clean,wash and roughly chop palak leaves ( you can retain stems too ) .
Next blanch the spinach.Boil water in a big vessel and add cleaned spinach .Allow it in hot water for 1 min.Strain the spinach(don't discard the water,can be used for something )
Meanwhile, heat oil in a small pan. When oil is hot, add urad dal ,chana dal ,hing & red chillies fry till dal turns golden. Turn off the heat, add coconut & let it cool completely.
Transfer the fried masala, cooked leaves ,jaggery ,tamarind ,haldi and salt to a mixer / blender. Grind to a smooth paste.Taste test .
Prepare the tempering .Heat oil in a small pan. When oil is hot, add mustard,garlic and curry leaves. Fry it until garlic turns golden brown. Now add grounded chutney to this.Bring a boil by stirring in between .
Serve Spinach chutney with hot steamed rice / idli / dosa ..Stays good for 3-4 days in fridge .
If you don't want garlic you can replace it with hing.