Wash mangoes very well and peel it.
And grate it using bigger size grater (not the small one otherwise you are not able to see mango shred after cooking it later on).
Measure it 2 cups by tightly packing into the cup.
Take grated mango in a pan in which you are going to cook.
Add turmeric powder and salt. Mix well. And let it sit for 15-20 minutes covered.
After 15-20 minutes, you will notice that mango shred has started to soften slightly.
Now add 2 tablespoons of sugar at a time and stir well using spatula till sugar dissolves.
Then add again 2 tablespoons of sugar and stir till sugar dissolves.
Repeat the same process till all sugar get dissolves.
It will take about 15 minutes and you get nice arm exercise.
Then put the pan on medium-low heat and stir continuously and heat till all sugar get dissolve properly and you get nice sugar syrup.
You will see few bubbles on top, at that time stop cooking.
Turn off the stove and remove it from heat.
Let the mixture cool completely.
Then add red chili powder and crushed cumin seeds. Mix well.
Store aam chunda in clean and dry glass jar.