Scotch fillet steak is prepared from a boneless beef rib set. The scotch fillet is found on the back of the animal and runs from the striploin (sirloin) to the chuck. Being a 'support' muscle not subjected to the heavy work of moving the animal around, scotch fillet steaks are tender, tasty and moist and perform best with fast hot cooking methods such as pan-frying and barbecuing or stir-frying when thinly sliced.