Preheat oven to 350 degrees F. Stack tortillas and wrap in foil. Bake about 10 minutes or until softened. Meanwhile, in a medium bowl, combine mozzarella cheese, provolone cheese, olives, nuts, and the 2 teaspoons snipped oregano or 1/2 teaspoon dried oregano. Spread cheese mixture onto half of each tortilla. Fold tortillas in half; secure with wooden toothpicks. Brush one side of each quesadilla with some of the oil.