Preheat oven to 200C/400F fan-forced. Place chicken between 2 sheets plastic wrap and pound to 1/4-inch thick with a rolling pin.
Coat the chicken first in flour, shaking off excess, then dip in the beaten egg and finally coat well with breadcrumbs. Place on a baking tray. Repeat with remaining chicken, flour, egg mixture and breadcrumbs.
Spray chicken with olive oil. Bake for 5 minutes. Remove from the oven and top each with two tablespoon pasta sauce. Arrange avocado over sauce and sprinkle with cheese. Return to oven. Bake for 5 to 7 minutes or until golden and chicken is cooked through.
