1. Combine first 6 ingredients in a medium bowl. Gradually add walnut oil, stirring constantly with a whisk.
2. Combine spinach, tangelo slices, and endive in a large bowl. Drizzle dressing over salad, tossing to coat. Arrange 1 cup salad on each of 6 salad plates, and sprinkle evenly with walnuts and black pepper. Serve immediately.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.