Kale Apple Walnut and Sumac Onion Tabbouleh recipes

Name: Kale, Apple, Walnut and Sumac-Onion Tabbouleh recipes
Ingredients: 1 cup finely diced red onion (½ large red onion); 2 tablespoons red wine vinegar; 2 teaspoons ground sumac; ¼ teaspoon kosher salt; 2 cups packed shredded kale; ¾ cup finely chopped walnuts; ½ cup diced apple (½ Honeycrisp); ¼ cup pickled sumac onions; ¼ cup pomegranate seeds, plus more for garnish; 3 tablespoons fresh lemon juice; 2 tablespoons olive oil; ¼ teaspoon kosher salt, plus more to taste