Start by washing your baby spinach or mixed greens thoroughly under cold water. Dry them gently using a salad spinner or by patting them down with paper towels.
In a large mixing bowl, combine the washed greens, pomegranate seeds, cranberries, thinly sliced apple, candied pecans or walnuts, and optional feta cheese and red onion. Toss everything together lightly.
In a small bowl or jar, whisk together honey, Dijon mustard, apple cider vinegar, olive oil, salt, and pepper until smooth.
Drizzle your homemade honey mustard dressing over the salad just before serving. Gently toss again to coat all ingredients evenly.
Transfer your beautifully dressed Christmas Salad with Honey Mustard Dressing into a serving bowl and enjoy!