Spicy Chicken and Almond Stew

Name: Spicy Chicken and Almond Stew
Ingredients: 4 skinless, boneless chicken breasts, cut into 1-inch chunks (about 11/2 pounds); Kosher salt and freshly ground black pepper; 3 tablespoons vegetable oil; 1 onion, chopped; 1 tablespoon minced garlic; 1 tablespoon minced peeled ginger; 1 sweet potato, peeled and cut into 1-inch chunks; 1 apple, cut into 1-inch chunks; 3/4 teaspoon cayenne pepper; 3 cups chicken broth; 6 cups chopped kale; 1 large tomato, chopped; 1/2 cup almond butter; 1/2 cup fresh cilantro