Grease a griddle with oil; heat over medium heat. Lightly sprinkle tortillas with water to moisten., Place eight tortillas on griddle; sprinkle with cheese. After cheese has melted slightly, top with 1 cup pico de gallo, avocado and cilantro. Top with remaining tortillas., Cook 3-4 minutes on each side or until lightly browned and cheese is melted. Serve with additional pico de gallo.