Ciabatta is an Italian bread also known as slipper bread.
The process involves making Biga (pre-fermentation) the day before and then mixing in the other ingredients.
1/2 cup flour
1/4 tsp yeast
1/4 cup water
Mix them and let it sit overnight.
Next day, combine the following ingredients with the biga and knead well.
2 cups flour
1/2 tsp yeast
1 cup and 2 tbsp water
1 tsp salt
Let it sit for a few hours until it has tripled in volume.
Transfer it to the baking sheet and let it rise for another 40min.
Bake for 30min at 250C.