Ingredients

2 oranges, peel and pith removed

1 tablespoon white-wine vinegar

1 tablespoon Dijon mustard

3 tablespoons extra-virgin olive oil

Coarse salt and ground pepper

1 large fennel bulb, cored and very thinly sliced, fronds reserved

5 ounces baby arugula (5 cups)

Preparation

Working over a medium bowl, cut out orange segments, then squeeze juice from membranes. To a jar, add 2 tablespoons juice, vinegar, mustard, and oil; season with salt and pepper. Shake to combine.

Combine fennel and fronds, arugula, and orange segments in a bowl. Drizzle with dressing and toss to combine.