Stuffed bottle gourd, or marrow

This recipe is from Sulawesi. Petola is a relative of cucumbers and vegetable marrows, and is what in Java we would call oyong (under which name it appears in the descriptive catalogue of fruit and vegetables) or ernes. In English, it is usually called a bottle gourd. I have never come across them in Britain, where they could only be grown in hot-houses, but I have often made Petola Daging with small marrows or large courgettes, with excellent r