Tuscan Chicken Simmer

4 (4 ounce) boneless, skinless chicken breast halves

4 ounces PHILADELPHIA Cream Cheese, cubed

¼ cup water

¼ cup pesto

2 cups grape or cherry tomatoes

1 cup KRAFT Finely Shredded Italian* Style Five Cheese Blend

Heat large nonstick skillet sprayed with cooking spray on medium-high heat. Add chicken; cover. Cook 5 to 7 min. on each side or until done (165 degrees F). Remove chicken from skillet; cover to keep warm.

Add next 4 ingredients to skillet. Cook, uncovered, on medium heat 2 min. or until heated through, stirring occasionally.

Return chicken to skillet. Cook and stir 1 min. or until chicken is coated and heated through. Sprinkle with shredded cheese.