Top loin steak should be cooked by dry-heat methods. To prepare top loin steak for broiling, grilling, or pan-broiling, trim external fat, if desired. Use tongs to turn top loin steak when cooking; a fork may pierce the meat and allow juice to escape.
Internal temperature for medium rare is 145F (63C), for medium 160F (71C). You can also judge the doneness of steak by pressing the meat with your finger. Very rare meat offers little resistance, medium rare is slightly springy, medium is firm and springy, while well done is quite firm.
Preheat the broiling element. Place the top loin steak on a broiler pan 2 to 4 inches (5-10cm) from the heat source. Cook 9 to 11 minutes, turning once. Remove the steak when it reaches the desired degree of doneness.
Brush top loin steak lightly with oil, if desired, and place directly over the heat source. Grill 10 to 12 minutes, depending on thickness of the steak. Turn once and remove when it reaches the desired degree of doneness.
Heat the skillet on the stovetop until hot. Place top loin steak on the skillet and cook 8 to 10 minutes, turning once. Remove steak when it reaches the desired degree of doneness.