Made this last night and enjoyed it.
I didn't have any green mango or tamarind, so just used extra lemon juice as the recipe suggested. I may have overdone it a tad on the lemon flavour, so will bear that in mind next time.
I wasn't sure how chunky it was supposed to be, mine was quite finely chopped, and after cooking, the cabbage had all but disappeared while the carrot was still quite crunchy. Next time I would try chopping the carrot first, then adding the cabbage so that it stays a bit coarser.
Sue