Slow Cooker Pulled Chicken Sandwiches

Name: Slow Cooker Pulled Chicken Sandwiches
Ingredients: * 1 small onion, finely chopped; * 3 clove garlic, finely chopped; * 1 can (8 ounce) tomato sauce; * 1/4 cup tomato paste; * 1/4 cup cider vinegar; * 1 tablespoon worcestershire sauce; * 2 tablespoon light brown sugar; * 2 tablespoon molass; * 2 tablespoon paprika; * 2 tablespoon chili powder; * 1/4 teaspoon cayenne pepper; * 1 teaspoon kosher salt; * 1/2 teaspoon black pepper; * 1 lb boneless, skinless chicken thigh, trimmed of fat; * 1 lb boneless, skinless chicken breast, trimmed of fat; * optional: whole wheat roll and summer coleslaw (see recipe below)