4 cups packed finely chopped raw kale
1 large apple, chopped, divided
1 cup thinly sliced celery
1/2 cup walnuts, toasted and chopped, divided
1/4 cup plus 2 tablespoons raisins, divided
2 tablespoons Dijon mustard
2 tablespoons water, more if needed
1 tablespoon red wine vinegar
1/8 teaspoon sea salt

Place kale in a large bowl. Add half the apple to kale along with celery, 1/4 cup walnuts and 1/4 cup raisins. Put remaining apple in a blender along with remaining 1/4 cup walnuts, remaining 2 tablespoons raisins, mustard, water, vinegar and salt. Purée until well combined and slightly thick, adding water if needed to thin. Pour dressing over kale salad and toss to combine.