Preheat oven to 425°F with large baking sheet inside.
Mix oil and garlic in small bowl; brush one side of each lavash.
Remove hot sheet; carefully place lavash oiled-side down.
Brush tops with remaining garlic oil; top with mozzarella, leaving small border.
Distribute chicken, pepper, onion, spinach, and olives evenly over cheese.
Sprinkle with feta; season with oregano, salt, and pepper.
Bake 8-10 minutes until edges are golden and crispy and cheese melted and bubbly.
Remove; cool 1-2 minutes, then slice and serve immediately.