Step 1

Heat dressing in large nonstick skillet on medium-high heat. Add chicken; cook 10 min. or until evenly browned, turning occasionally.

Step 2

Stir in next 4 ingredients; cover. Simmer on medium-low heat 20 min. or until chicken is done (165°F), stirring occasionally. Meanwhile, cook spaghetti as directed on package, omitting salt.

Step 3

Remove skillet from heat. Add Parmesan to chicken mixture; stir. Sprinkle with mozzarella; let stand 5 min. or until melted.

Step 4

Drain spaghetti; place on platter. Top with chicken mixture.