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 (170ºF).
REMOVE chicken from skillet. Shred chicken with 2 forks or chop into small pieces. Return to skillet; stir until evenly coated with sauce. Cut baguette lengthwise in half; spread top half evenly with Cheez Whiz. Cut crosswise into four pieces. Fill with chicken mixture.
serving size = 1 sandwich (233 g)