Chicken Freezer Burritos

Name: Chicken Freezer Burritos
Ingredients: 2 teaspoons extra-virgin olive oil or avocado oil; ½ cup chopped red onion; 1 teaspoon minced garlic; 1 (15 ounce) can low-sodium black beans, rinsed; ½ cup water; 1 tablespoon minced chipotle pepper in adobo sauce; 2 cups shredded cooked chicken; 2 cups chopped kale; 1 cup reduced-fat sharp Cheddar cheese; 2 tablespoons chopped fresh cilantro; ½ teaspoon grated lime zest (Optional); 1 tablespoon fresh lime juice; ¼ teaspoon salt; 4 (8 inch) whole-wheat tortillas