This one comes by way of Pher Engi – thanks again! So, maybe Wikipedia has a clue…
Soto Banjar is a typical soto from the Banjar tribe , South Kalimantan , with the main ingredient being chicken and having the fragrant aroma of spices such as cinnamon , nutmeg and cloves . This soto contains shredded chicken, with the addition of perkedel , boiled potatoes, boiled eggs, pieces of carrot and ketupat . [2]