Recipe: Vegetarian Stuffed Sweet Potatoes

Name: Recipe: Vegetarian Stuffed Sweet Potatoes
Ingredients: 4 large sweet potatoes (about 2 pounds total), scrubbed and patted dry; 2 tablespoons olive oil; 1 small yellow or white onion, finely chopped; 1/2 teaspoon kosher salt; 1 (15-ounce) can black beans, drained and rinsed; 1/4 cup water; 1 finely chopped canned chipotle in adobo chile; 1 tablespoon plus 2 teaspoons sauce from can of chipotles in adobo, divided; 1 medium lime, halved, divided; 1/2 cup whole-milk plain Greek yogurt; 1 medium avocado, diced; 2 tablespoons chopped fresh cilantro leaves and tender stems