A 1 inch boneless rib eye, tenderloin, or top loin steak should be cooked for 6-8 minutes on the George Foreman Grill (covered) at 350 degrees F to 375 degrees F for medium ra … re.If you are cooking uncovered it should be 8-11 minutes.45 people found this useful. 1 inch boneless rib eye, tenderloin, or top loin steak should be cooked for 6-8 minutes on the George Foreman Grill (covered) at 350 degrees F to 375 degrees F for medium ra … re. If you are cooking uncovered it should be 8-11 minutes. 45 people found this useful.