Heat oven to 425°F. Lightly spray 14-inch pizza pan with nonstick cooking spray. Unroll dough; place in sprayed pan. Starting at center, press out dough with hands to edge of pan. Bake at 425°F. for 6 to 8 minutes or until crust begins to brown.
Meanwhile, in medium bowl, combine chicken, apple, almonds, mayonnaise, tarragon, salt and pepper; mix well.
Remove partially baked crust from oven. Spread chicken mixture evenly over crust. Sprinkle with cheese.
Return to oven; bake an additional 10 to 12 minutes or until cheese is melted and crust is deep golden brown. Sprinkle with green onions. Cut into 12 wedges.