This salad is light and refreshing before a heavy meal. Filled with spinach, blueberries, and avocado, this salad is full of nutrients and antioxidants. The homemade green onion balsamic vinaigrette is fast to whisk up and sure to wow your guests. Photography by Katie Nixon Photography. Bleu Cheese Blueberry Spinach Salad (Serves 6) 1 lbs…