
If using Candied Walnuts, heat a small skillet on medium-high eat. Add the walnuts and periodically stir for around 3 minutes until fragrant.
Transfer the nuts to a plate. Add the brown sugar, cinnamon, water, and salt to the same skillet. Stir until brown sugar is dissolved and add the vanilla. Add the walnuts and stir until coated; remove from the heat.
Transfer walnuts to parchment paper in a single layer.
Prepare the salad dressing: add all ingredients for the salad dressing to a container with a covered lid; shake until combined.
In a large bowl, layer the baby spinach, apple slices, walnuts, blue cheese and cranberries.
Drizzle with the salad dressing and lightly toss before serving.