Top sirloin is a cut of meat from the primal loin. Top sirloin steaks differ from sirloin steaks in that the bone, the tenderloin and bottom round muscles have been removed. To prepare heat oven to 400°F. Also heat a medium cast-iron pan over medium heat. Sear meat on all sides until it has a brown crust. Transfer pan to oven; roast meat 10 to 15 minutes. Remove; let meat rest 10 minutes slice, sprinkle with coarse salt and serve.