Preheat oven to 425°F. Drain chicken and toss in teriyaki sauce. Place pizza crust on pizza pan; spread evenly with barbecue sauce and sprinkle with mozzarella. Top with chicken, red onion, and mushrooms. Bake on lowest rack in oven for 15 to 20 minutes or until crust is golden brown and cheese is melted and bubbling. Garnish with green onion and sesame seeds.