Soto is a traditional Indonesian soup mainly composed of broth, meat and vegetables.
Soto Kuali is a typical soto from Solo (Central Java) which is cooked in kuali (a cooking pot made from clay). This low temperature cooking method makes the meat tender and tasty. If you use a normal metal cooking pot, just boil the meat over low heat.
Then another characteristic of this dish is the seasoning that come from tempeh (javanish soy bean cake) which begins to rot. I use tempeh in the recipe though; but not spoiled tempeh.