1/4tspasafetida( for gluten free version - skip / or check label for ingredients as some brands contain some all purpose flour / maida )
Chop the spinach roughly. Bring some water to a boil in a saucepan. Add the spinach to the boiling water. Let it cook for 2 mins, not more. Keep the ice mixed with some more cold water ready in a bowl nearby. Take the spinach out of the saucepan with a pair of tongs and dunk in the ice cold water.
Now blend the spinach to a fine puree in a blender or a food processor.
Heat the oil in a saucepan. Add the mustard seeds. Once they splutter, add the dried red chilies and the asafetida. Add the pureed spinach and salt. Mix well. Let it stay on medium heat for a few minutes and remove from heat.
Enjoy the spinach mash with some rice and yogurt, as a dip or even as is Smile
Variation: You can add some garlic to it to make a garlic spinach mash!