This sandwich can be served as Lunch, cut in to small size and serve for snack.
You can prepare it ahead of time and keep in the refrigerator-properly covered.
I usually keep Chutney ready in tiny containers in the freezer and use it as needed.
Put Cilantro, Chilies, Ginger, and all other items Except Oil in Blender. Blend at medium speed, you may have to stop the blender and mix the ingredients. Chutney should be like a spreadable paste, you may need to add just a little water
Once the paste is done, put it in the serving bowl or store in a jar adding the oil.
Chutney Sandwich has been very popular in India. It is also sold by Hawkers and, have many verieties.