Have you seen those red squashes in supermarkets that says kokum juice? It’s mostly made during summers at home because of its cooling properties. It is also great to relieve acid reflux. I recently bought some and used it in my mutton curry. It acts as a souring agent lending a touch of sweetness to the curry. All you need to do is soak the kokum in warm water for it to release its juices. Then add the whole thing to your curry. Even the kokum. It tastes great once the sourness has toned down.