Our neighbor made a great tasting soup for us that we had to get the recipe for.
Saute some sliced onion in a stock pot. Add minced pork and brown. Cover with water, add chopped tomatoes and bring to a simmer. Add in sliced eggplant and stir. Season with a bit of fish sauce.
Chop up some shiso (perilla) leaves and add them to the soup. Serve hot. So good, one bowl is not enough.
Aloha, Nate