01 - Melt butter in a nonstick skillet over medium heat. Add sugar and walnuts, stir frequently until sugar melts and coats walnuts, about 4 to 5 minutes. Sprinkle with sea salt, transfer to parchment paper, and cool completely.
02 - Whisk together olive oil, apple cider vinegar, Dijon mustard, honey, salt, and pepper in a small bowl or jar until emulsified.
03 - In a large salad bowl, combine mixed winter greens with the thinly sliced pears.
04 - Incorporate the cooled candied walnuts and crumbled cheese if using.
05 - Drizzle dressing over salad components and toss gently until evenly coated.
06 - Serve immediately, optionally garnished with extra walnuts or cheese.