Spray counter or surface lightly with cooking spray. Combine rolls to form a ball. Roll into a 13-in. circle. Transfer dough to a 12-in. pizza pan coated with cooking spray; build up edges slightly.
Poke holes in crust with a fork. Bake at 350° for 10 minutes. Remove from oven to cool. Meanwhile combine all pesto ingredients in a food processor or blender; cover and process until well blended. Spread pesto evenly over cooled crust.
Combine chicken and taco seasoning; mix well. In a large skillet, saute chicken in oil until juices run clear. Top pesto with chicken, cheese, tomato and green onions. Bake at 350° for 10-15 minutes.