- 2 tablespoons Sherry wine vinegar
- 2 tablespoons apple cider vinegar
- 1 teaspoon Dijon mustard
- 6 tablespoons extra-virgin olive oil
- 6 dried Anaheim or dried New Mexico chiles, stemmed
- Canola oil
- 2/3 cup shelled raw pepitas (pumpkin seeds)
- 4 9-ounce bags spinach leaves (not baby spinach)
- 2 10-ounce bunches large red radishes, trimmed
- 4 ounces Cotija cheese or feta cheese, crumbled
- Whisk both vinegars and mustard in small bowl. Gradually whisk in olive oil. Season to taste with salt and pepper. DO AHEAD: Dressing can be made 1 day ahead. Cover and refrigerate. Bring to room temperature before using.
- Cut chiles in half lengthwise; discard seeds. Using scissors, cut chiles crosswise into 1/4-inch strips. Pour enough canola oil into large skillet to reach depth of about 1/8 inch; heat over medium-high heat. Add chiles and fry until beginning to crisp, about 45 seconds. Using slotted spoon, transfer to paper towels to drain. Add pepitas to same skillet and fry until golden brown and crisp, 1 to 2 minutes. Transfer to another set of paper towels to drain. Sprinkle chiles and pepitas with salt. Cool completely. DO AHEAD: Can be made 1 day ahead. Store airtight at room temperature.
- Line 1 large bowl and 1 small bowl with paper towels. Working in batches, stack spinach leaves into piles and cut crosswise into 1/4-inch-thick strips. Transfer to prepared large bowl.
- Using grating disk on processor, grate radishes. Place in strainer set over another bowl; drain 15 minutes. Transfer to small bowl lined with paper towels. DO AHEAD: Can be made 8 hours ahead. Cover; chill.
- Place spinach, radishes, chiles, pepitas, and cheese in very large bowl. Toss with dressing. Season with salt and pepper.
- Available at some supermarkets and at specialty foods stores and Latin markets.