1 red pepper, finely chopped
1 small red onion, finely chopped
1/4 tsp. ground black pepper
3/4 cup HEINZ Tomato Ketchup, divided
1/4 tsp. LEA & PERRINS Worcestershire Sauce
2 lb. ground turkey or ground turkey breast
36 round buttery crackers, crushed
1 cup KRAFT Mexican Style Finely Shredded Four Cheese, divided