Although pizza was born in Naples, it is of course now eaten all over Italy – and the world. I am so used to topping it with the usual tomato, mozzarella, basil, anchovies and olives, but this more robust alternative is a most pleasant surprise. Although Gruyère is not an Italian cheese, it goes really well with this ‘pizza of the mountains’, and is readily available to buy. Be warned, this is a very filling pizza, but it’s also very delicious!