Soak the onions in a small bowl of ice water for 10 minutes to remove some of the potent flavors. Drain well, place on a paper towel and pat well to absorb the water.
Make the dressing:
In a mason jar, combine all of the salad ingredients and shake until well combined.
Assemble the salad:
In an epic salad bowl or a very large plate, add your arugula greens. Top with sliced pears and onions (drained). You can leave in clumps or spread them throughout.
Sprinkle on goat cheese, cranberries, and nuts.
Shake the mason jar again with the salad dressing right before serving. Optional to drizzle the dressing over the entire salad and serve, or toss the salad and serve. Also optional to serve the dressing on the side and let guests add their own dressing.