Shred or thinly slice mangos and keep it aside.
Powder the jaggery and keep it aside.
In a small pan, heat oil in a pan, add mustard seeds, allow it to crackle and add curry leaves and green chilis, keep it aside.
In a pan add one cup of water and bring it to boil.
Add the shredded mango.
Add salt and turmeric powder, and cook covered for few minutes.
Once done, add jaggery powder, and cook for 5-8 minutes.
Add cardamom powder.
Add the seasoning mix with mango pachadi.
Serve hot with rice.