- 1 cup (packed) baby spinach leaves
- 1 cup (packed) arugula leaves
- 1/2 shallot
- 3/4 cup sour cream
- 3 tablespoons whole grain Dijon mustard
- 1/2 cup chopped seeded peeled cucumber
- Finely chop spinach, arugula, and shallot in processor. Add sour cream and mustard; process just until blended. Transfer to medium bowl. (Can be prepared 6 hours ahead. Cover and refrigerate.) Stir cucumber into sour cream mixture. Season to taste with salt and pepper.