the classic here in the states is lots of butter and 'american' cheese, which is honestly a travesty when it comes to legit cheese but those sandwiches are delicious. especially when dipped in tomato soup.
For something different, grill two generous slices of fresh mozzarella between bread of your choosing slathered in pesto.
For something different, grill two generous slices of fresh mozzarella between bread of your choosing slathered in pesto.