Pour the cold water into a pitcher or glass.
Dissolve the fresh yeast in the cold water, stirring until completely dissolved.
In a large bowl, add the strong flour.
Pour the yeast-water solution over the flour.
Mix with a fork until the ingredients are just incorporated and a rough, shaggy dough forms.
Transfer the dough to a non-airtight container, ensuring the lid allows air to pass through.
Let the biga rest at 18°C overnight for 18-20 hours.
Transfer the fermented biga into the bowl of a stand mixer.
Add the medium strength flour, malt, and a portion of the cold water.
Use the dough hook attachment and start the mixer at low speed.
Gradually add the remaining water.
Let the ingredients knead until well incorporated and a smooth, elastic dough forms.
Gradually increase the speed, but be careful not to overheat the dough; check the temperature with a thermometer.
Add the salt and continue kneading at medium speed for about 5-7 minutes, until the dough is smooth and elastic.
Transfer the dough onto a work surface.
Perform folds on the dough to reinforce it without overworking it, folding it onto itself.
Cover the dough and let it rest for 10-15 minutes.
Give it another reinforcement fold and place the dough in a greased container.
Let the dough proof at around 26°C for about 1 hour, or until doubled in size.
Once the resting time is over, shape the dough into an elongated loaf without making it too tight.
Place the loaf in a greased container and let it proof at around 26°C until doubled in size.
When the dough has proofed, stretch the pizza by hand using plenty of semolina.
Transfer the stretched pizza onto a 30×40 cm (approximately 12×16 inches) iron pan.
Bake the pizza in the bottom of a preheated oven at 250°C (482°F).
Bake for about 10-15 minutes, or until the surface is golden and crispy.
Once baked, remove the pizza from the oven and let it cool slightly before serving.