Cilantro-Lime Chicken Quesadillas

Ingredients:

 2 cups cooked chicken, shredded, 1/2 cup finely chopped red onion, 1/4 cup fresh cilantro, chopped, 1 tablespoon lime juice, 1/2 teaspoon cumin, 1/4 teaspoon salt, 1/4 teaspoon black pepper, 2 cups shredded Monterey Jack cheese, 8 flour tortillas (8-inch), 2 tablespoons olive oil.