I cooked this soup a month or so ago but I went on a break from the blog at the time. I got the recipe, Sinampalukang Langka (green jackfruit in tamarind broth) from Yummy online magazine. I thought at first the ingredients are a bit unusual but I'll eat any sour soup flavored with fish sauce. I like its uncomplicated flavors and will make it again for sure.
Fresh green jackfruit is not available here in the US. I buy the Thai canned ones whenever there is a need for it. If it's available, use the fresh ones. Green jackfruit is a good ingredient for vegan recipes because of its texture and ability to absorb seasonings.