"등갈비가 잠길정도의 물에 등갈비를 제외한 육수 재료를 넣고 끓인후 등갈비를 넣어 삶는다."
(잠길정도의 -> 잠길 정도의; 끓인후 -> 끓인 후)
Here's one way to translation it.
Get water just enough to submerge the sirloin ribs, pre-simmer meat stock ingredients in it without the ribs, then boil it with the ribs.