Cook 6 Singles, Neufchatel and milk in small saucepan on low heat 5 min. or until Singles are melted, stirring constantly. Whisk until completely smooth. Keep warm.
Fill tortillas with turkey and remaining Singles to make 6 quesadillas. Cook, in batches, in skillet on medium heat 4 min. on each side or until both sides are lightly browned. Cut into quarters.
Serve topped with cheese sauce and remaining ingredients.