1. Cut chicken breast half into 1/2-inch strips; add 2 tablespoons bottled BBQ sauce. Refrigerate for 1 hour.
2. Spread 2 tablespoons BBQ sauce on pizza bread shell. Sprinkle with shredded mozzarella. Top with chicken and red onion, thinly sliced. Bake at 350 degrees F 12 to 15 minutes; broil 1 to 2 minutes.