Preparation Mix chicken, potatoes, salsa, broth, cumin, salt, and pepper in slow cooker. Cover and cook until chicken shreds easily with a fork and sweet potatoes are tender, about 4 hours on high or 6 hours on low. Add beans during last 30 minutes of cooking. Shred chicken in slow cooker with 2 forks. Taste and season with salt and pepper, if needed. Serve topped with avocado, cilantro, sour cream, and/or onion, if using. Do Ahead Chili can be made 3 days ahead; cover and chill. Cooks' NoteThis chili can be prepared on the stovetop in a Dutch oven or large pot. Bring to a simmer and cook, covered, over medium-low heat until chicken shreds easily with a fork and sweet potatoes are tender, about 1 1/2 hours. Add beans during the last 30 minutes of cooking.