1. Preheat oven to 400 degrees F. Place sweet potato chunks into a large bowl and toss with olive oil and Kosher salt. Roast for 20 minutes or until cooked through, flipping once. Remove from oven and let the potato chunks cool.
2. While the potatoes are roasting, make the dressing by adding all ingredients into a small bowl and whisking until smooth.
3. Add the spinach to a large bowl and assemble the salad. Pour dressing over salad when ready to serve.