01 - Heat a nonstick skillet over medium heat. Add walnut halves, granulated sugar, and unsalted butter. Stir constantly for 3 to 4 minutes until sugar melts and coats the walnuts evenly. Sprinkle with sea salt, transfer to a parchment-lined plate, and allow to cool completely.
02 - In a small bowl, whisk together extra-virgin olive oil, apple cider vinegar, Dijon mustard, honey, salt, and freshly ground black pepper until emulsified.
03 - Place mixed winter greens in a large bowl and toss with half of the vinaigrette to lightly coat evenly. Arrange greens on a serving platter or individual plates.
04 - Layer thinly sliced pears, red onion, crumbled cheese, and cooled candied walnuts over the dressed greens.
05 - Drizzle remaining vinaigrette over the assembled salad just before serving to maintain freshness and texture.