Moringa oleifera is Saragvo in Gujarati. West Indians and South Indians add its fruit which are stick shaped to curries and dals. Outer layer of these sticks is not human edible but center has softer flesh and seeds. So when eating a curry with drumsticks first juices are sucked and then sticks are chewed to crush and to release inner flesh and seeds which are then sucked up and outer layer is then just discarded. Not particularly "civilized" good-table-mannerish way of eating if you compare with how western people eat. We Gujarati eat almost exclusively cooked with thick Kadhi sauce but South Indians add it to Sambar.

Although the tree name is horseradish tree its roots are not horseradish (although they too taste like horseradish). The tree from which horseradish is obtained is: Cochlearia armoracia (=Armoracia rusticana).

All this information is from a variety of sources including the wikipedia article on moringa oleifera and a PDF file that is listed when I searched google with words: Moringa oleifera hindi

-Bakulesh