Wash the mango well and cut them into 1 inch thick long strips. Apply the salt, turmeric and chili powder to them
Heat a pan with the mustard oil and let it smoke. Lower the flame and add the mustard seeds and dried chilis
Once the seeds pop, add the mangoes and sautee´ for 3-4 minutes
Add the water, cover and cook until the mangoes are completely soft and cooked
Add the sugar, stir it in well and cook until the sugar dissolves and remove from flame. Check if you need to add more sugar before switching off the flame
Serve the aamer chatni or Bengali style raw mango chutney at room temperature or chilled. Enjoy!