Puree 1/4 cup apple cider vinegar, 3 tablespoons chopped walnuts, 2 teaspoons dijon mustard, 1 teaspoon honey and 1/2 teaspoon kosher salt in a blender until smooth. Slowly add 1/3 cup olive oil with the motor running; blend until creamy. Combine 1 torn head escarole, 1 thinly sliced fennel bulb, 2 thinly sliced apples and/or pears, 1 cup fresh parsley, ½ cup chopped walnuts and 1/4 cup minced chives in a large bowl. Add the dressing, season with salt and pepper and toss.
Photograph by Con Poulos