In a large bowl, or stand mixer bowl, add the flour, yeast and salt, and mix to combine.
Combine the oil and water together, then pour into the dry ingredients.
Thoroughly mix the ingredients together, but there's no need to overmix.
Cover the bowl with clingfilm and place in the fridge overnight (see note 3).
When ready to bake, pre-heat the oven to 250℃ (482℉).
Pour the dough out onto a well-floured surface. Cover the dough with more flour.
Pat into a loose rectangle shape (see note 4). Using a pizza cutter, dough cutter or sharp knife, divide the dough into equal pieces.
Add a little flour to your hands and gently fold the edges underneath to shape them roughly (see note 5).
The dough is very sticky and hard to move. Either add a little more flour to your hands or use a dough scraper to pick them up (see note 5).
Place them on a lined baking tray, leaving space between each. Let the buns rest for a little bit, just until the oven is hot enough.
Bake for around 12 minutes, depending on size (see note 6), but as it is a very hot oven, keep a really close eye on them. Your buns should be very brown but not burned.
Allow to cool for at least ten minutes before eating. Any leftover can be frozen. Enjoy!