Heat oven to 400°F. Lightly grease cookie sheet with shortening or cooking spray.
Unroll pizza crust onto cookie sheet; press to spread dough out into an even layer. Spread 1/3 cup dressing over dough with back of spoon. Sprinkle chicken, bacon and half of the green onions over dressing in even layers. Top with cheese.
Bake 10 to 12 minutes or until crust is lightly browned and cheese in center is bubbly.
Sprinkle with remaining half of green onions. Cool slightly. Cut into about 1 1/2-inch-wide strips. Serve with additional dressing for dipping.