Sprinkle chicken with salt; place in a 5- or 6-qt. slow cooker.
Toast the sesame seeds in a dry skillet over medium heat, tossing, until golden, about 5 minutes. Set aside 2 tablespoons for garnish and transfer the rest to a blender.
Place the tomatoes, onion, chiles, almonds, raisins, chocolate, oil, chipotle pepper, garlic, cumin and cinnamon in blender, cover and process until blended. Pour over chicken.
Cover and cook on low for 6-8 hours or until chicken is tender; skim fat. Serve chicken with sauce, and sprinkle with cilantro if desired.
Freeze option: Cool chicken in mole sauce. Freeze in freezer containers. To use, partially thaw in refrigerator overnight. Heat through slowly in a covered skillet or Dutch oven until a thermometer inserted in chicken reads 165°, stirring occasionally and adding a little broth or water if necessary.
NOTE:Can use boneless skinless chicken, reduce cook time to 4 to 6 hours.