Spray 1 side of each bread slice with olive oil cooking spray. Place 4 slices, oil side down, on work surface; top with cheese, tomatoes, chicken, cucumber, eggplant banana peppers, red peppers, feta cheese, oregano and remaining 4 bread slices, oil side up.
Heat large skillet over medium heat. In 2 batches, cook sandwiches 6 minutes or until bread is golden brown and cheese melts, turning once and pressing down occasionally with large spatula. Cut sandwiches diagonally in half to serve.
Serving Size 1
Servings 0
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.