In a medium bowl, prepare the blue cheese dressing by mixing the blue cheese, Greek yogurt, light mayonnaise, maple syrup, and cider vinegar.In a separate large bowl, toss together the blue cheese dressing, salad greens, bacon, and pecans until all of the lettuce is well coated and ingredients are evenly distributed.Serve immediately. Store leftovers in the refrigerator and eat within 24 hours.