In a large bowl, combine the first seven ingredients. Place about 3/4 cup on half of each tortilla. Fold tortilla in half over filling and secure with toothpicks.
Place on a baking sheet coated with cooking spray. Bake at 400° for 8-10 minutes or until golden brown.
Carefully turn quesadillas over; bake 5-8 minutes longer or until golden brown. Discard toothpicks. Cut each quesadilla into three wedges. Serve with lettuce, salsa and sour cream.