Add oil in a kadai/pan.
Add mustard seeds and fry until they splutter.
Add fenugreek seeds and fry.
Add cleaned and chopped raw mango pieces and fry.
Add required salt and mix well.
When the mango pieces started to change colour add turmeric powder.
Next,add chilli powder. Use kashmiri chilli powder to acquire red colour.
Mix well to acquire the spice level in each one of the mango pieces.
Add jaggery and mix well.
When the pickle/chutney/achar reaches the required consistency, serve hot or in normal tempreature.