1. Cut chicken into 8 serving-size pieces. Place in ungreased 13 x 9 x 2-inch baking dish. Lightly sprinkle with pepper.
2. In medium bowl stir together marinara sauce, tomato paste, pepperoni and olives. Spoon sauce on chicken pieces.
3. Bake chicken, uncovered, at 350°F about 45 minutes or until chicken is no longer pink (165°F).
4. Meanwhile, in another medium bowl toss together Kellogg's Club Buttery Garlic crackers, cheese and Italian seasoning. Sprinkle on chicken pieces. Bake, uncovered, at 350°F for 5 to 10 minutes or until cheese is melted and crumbs are browned. To serve, use slotted spoon to lift sauce- and crumb-topped chicken out of juices.
Make ahead: Prepare casserole as directed above through step 2. Cover and refrigerate for up to 24 hours. Bake as directed above, except increase the step 3 baking time by 15 minutes.