• The night before you plan to cook the chili, add dry cannelini beans, salt and 6 cups water to the bowl of a slow cooker. Stir to combine; let soak overnight. In the morning, drain and rinse beans and return to slow cooker.
• Add next 8 ingredients (olive oil through jalapeños) and stir to combine. Add 3 cups of water, just enough to cover beans. Arrange chicken breasts in a single layer on the beans skin side up (the chicken breasts will be above the water line). Season with salt and freshly ground black pepper.
• Cook on high for 4 hours. The chicken breasts should be tender, but the beans may need to cook for up to 2 hours longer - check beans for doneness every 30 minutes or so until they are tender.
• Meanwhile, transfer chicken breasts to a cutting board; let rest until cool enough to handle, about 15 minutes. Remove and discard skin and bones. Shred and coarsely chop chicken; cover and refrigerate.
• When beans are tender, stir in chicken and roasted green chiles. Let stand 5 minutes in slow cooker to reheat chicken and chiles. Season to taste with salt and pepper.
• Ladle chili into serving bowls and top with cheese, sour cream, cilantro and green onions as desired. Serve.

To roast Anaheim chiles:

• Preheat broiler.
• Line a rimmed baking sheet with foil and arrange 8 Anaheim chiles in a single layer. Broil chiles for 12 to 15 minutes, flipping them half-way through. Transfer blackened chiles to a large bowl and cover with plastic wrap to allow them to steam.
• After about 15 minutes, transfer one chili to a cutting board. With your hands, remove skin, stem and seeds and discard. Lay chili flat on cutting board and repeat with remaining chiles, stacking them one on the other. When the chiles are in an 8-high stack, use a sharp knife to dice them into bite-size pieces.