Combine the bread flour, rye flour, semolina, dried yeast, sugar and salt in a large mixing bowl and stir to combine. (see note 4)
200 grams bread flour, 100 grams rye flour, 100 grams semolina flour, 2 grams dried yeast, 1 teaspoon sugar, 1 teaspoon sea salt, 300 ml water
Gradually add the water to the flour and yeast mixture and stir until you have a shaggy, rough dough.
Cover with a kitchen towel and allow the dough to rest for 15 minutes.
Using a spatula or wooden spoon, gradually pull the dough from the sides of the bowl to the centre.
Cover again, let it rest for fifteen minutes and repeat this step three more times.
Cover the dough in plastic wrap (cling film) and leave the dough to rise for 4 - 24 hours. (see note 5)
Transfer the dough to a clean, lightly floured surface, gently knead it, and stretch it to resemble a rectangle. (see note 6)
With the longer edge facing you, fold the longer sides into the centre and the shorter ends into the centre (repeat this step twice).
Using your hands, shape the dough into a round ball.
Place the dough ball into a bowl lined with a clean towel. Cover and let it rest for a second time until it doubles in size. (this could take anywhere between 60-90 minutes).
Preheat your oven to 230°C (450°F) and place an oven-safe pot with a lid to heat up for 30 minutes. A Dutch oven is perfect for this recipe! (see notes 7&8)
Remove the preheated Dutch oven and place the dough into it. You can score at the top if you like. Place the lid back on and bake for 30 minutes.
Very carefully remove the lid ( you will notice the bread is partially baked and pale in colour - don't panic! That's normal!). Drop the temperature to 220°C (430°F) and bake for a further 20 minutes.
Remove the bread from the oven (it should be golden brown) and allow it to cool completely before serving. (see note 9)