1. Unroll crescent dough into 8 triangles. Into lightly greased 12-inch pizza pan, press dough, especially at perforations, to seal. Or make a Homemade Pizza Dough .
2. In frypan, place oil and heat to medium temperature. Add chicken, onion, green pepper, mushrooms and olives and cook, stirring, about 5 minutes or until fork can be inserted in chicken with ease.
3. Spread pizza sauce over the crust or dough. Spoon chicken mixture evenly over sauce. Sprinkle garlic salt, oregano and parmesan cheese on all. Top with mozzarella cheese .
4. Bake, uncovered, in 425*F oven 20 minutes or until crust is done. Cut into wedges to serve.