1. Begin by washing the fresh baby spinach leaves thoroughly under cold water. Pat them dry with a clean kitchen towel or use a salad spinner to remove excess water.
2. In a large salad bowl, combine the spinach leaves, dried cranberries, crumbled feta cheese, sliced almonds, and thinly sliced red onion.
3. In a small mixing bowl or a mason jar, whisk together the olive oil, balsamic vinegar, and honey until well combined. Add salt and pepper to taste.
4. Drizzle the balsamic vinaigrette over the salad. Toss gently to ensure all the ingredients are well coated with the dressing.
5. Let the salad sit for 5-10 minutes to allow the flavors to meld together beautifully.
6. Taste the salad and adjust the seasoning if necessary, adding more salt or pepper to suit your preference.
7. Serve the salad immediately as a refreshing and festive side dish for your Christmas meal.