Prepare chicken according to the package instructions.
Top half of the tortillas with chicken, cheese and green onions; cap with remaining tortillas.
Heat 1 tbsp of oil in large skillet and set over medium heat. Cook quesadillas in batches, turning once, for about 5 minutes or until golden brown and cheese is melted. Add more oil as necessary.
Cut each quesadilla into quarters and serve with guacamole.
Serve salsa and sour cream along with guacamole, if desired.