Kadugu Manga Achar / Achaar refers to a variety of pickles from Kerala, India which is made from green , tender green Mangoes and Kadugu (Black Mustard seeds) cooked with spices, such as Turmeric and Cumin, Red Chili Pepper and of course Kadugu, Shallots/onions, Vinegar and Curry Leaves (Please see related article on Achar / Achaar)

Kadugu is also spelled sometimes as Kaduku which is the Malayalam term for Black Mustard Seeds. 

This Kadugu Manga Achar with picture below is one of the special Achar (Pickles) prepared during the Hindu wedding of one of the members of my second family in Allepey, Kerala, India.