Sausage and onion

Cut the onion in 6 mm thick slices. Soak in plenty of cold water for an hour.
Heat a non-stick pan with a drizzle of oil, sauté the onion quickly in the white vinegar. Add the sugar and the salt, cover with water and cook on a high heat until all the water evaporates. Lay the sausage in a bowl and break it into pieces.

Roll out the disc of dough, add the onion followed by the mozzarella and finish with the sausage pieces, then bake in a wood-fuelled oven. Cut into 8 slices and serve.