In a bowl mix together mozzarella cheese, olives, bell peppers, corns onions, chilly flakes, pizza seasoning and very little salt.
Take one of the bread slices and apply butter, pizza seasoning and turn it over.
Now apply pizza sauce on the top side of both the bread slices and put generous amount of stuffing on one piece (watch video for more details).
Cover it with other piece of bread and press it gently. Now heat the pan at low heat. And put sandwich butter side down.
Cover the bread with a plate and put some heavy weight on plate. Let the sandwich cook from down till it becomes nice brown and crispy.
Once sandwich is crisp from down. Apply some butter and pizza seasoning on top of the sandwich. Flip it over.
Cover it again with plate and weight and let it cook for few minutes or till it is crisp from this side too. Pizza sandwich is ready to serve. Enjoy it with some tomato ketchup.