COOK chicken and onions in skillet on medium-high heat 8 min., stirring occasionally.

ADD barbecue sauce, water and sugar; stir. Reduce heat to medium; cover. Cook an additional 7 min. or until chicken is cooked through (165ºF).

REMOVE chicken from skillet. Shred chicken with fork or chop into small pieces. Return to skillet; stir until evenly coated with sauce. Cut baguette crosswise into four pieces. Cut each piece lengthwise in half. Fill with chicken mixture and Singles.