In a bowl, gently toss avocado and tomato with dressing (avocado and tomato can be prepared up to six hours before serving).
At serving time, spread about 2 teaspoons of cheese on each gridiron (toast slice).
On each gridiron (toast), place an avocado slice on one side and diced tomato on the other.
Repeat with remaining gridirons (toast), avocado and tomato.
For Avo Eyes only: Sprinkle with chopped cilantro, chives, green onion and ground pepper, if desired.