Blend until onion is very fine and mixture is well blended
Dress salad and serve immediately
Garnish with apple slices
Notes
For the freshest flavor, use crisp apples such as Honeycrisp, Fuji, Gala, or Pink Lady. Their sweet-tart flavor and crunchy texture pair perfectly with the tender spinach.
To keep sliced apples from browning, toss them in a bowl with a little salt and soak for a few minutes. Remove and pat try and store in a airtight bag until ready to use.
Wash and thoroughly dry the spinach before assembling the salad. Dry leaves help the dressing cling better and keep the salad from becoming watery.
Make the dressing up to several days in advance and store it in an airtight container in the refrigerator. Give it a good shake or whisk before serving, as the ingredients may separate.
Wait to dress the salad until just before serving. This keeps the spinach crisp and prevents it from wilting.
Toast the nuts before adding them to the salad for extra crunch and deeper flavor. Just a few minutes in a dry skillet or the oven makes a big difference.
This salad is easy to customize with ingredients you already have on hand. Try adding dried cranberries, feta or goat cheese, blue cheese, candied pecans, walnuts, or grilled chicken to make it a complete meal.