Grease and line your small USA pan Pullman pan – 23cm length X 10cm width X 10cm height (9 X 4 X 4 inches). I like to line my tin so that there are baking paper handles to lift the bread out at the end of baking.
Combine the dry ingredients in a large mixing bowl and whisk thoroughly.
Add the wet ingredients and whisk thoroughly until completely combined.
When freshly whisked, your dough should look and feel like a thin, aerated batter. It should feel like under the whisk and have little air bubbles on the surface. I would describe it as a thin batter with baking soda that just had an acid added - that sort of light and aerated. If your dough is significantly thicker than this immediately after whisking, add more water until you reach this consistency. Hydration is hugely dependent on your individual flours, so you need to use your intuition as opposed to following a recipe without assessing your own dough.
Cover the bowl and allow to proof for 1 hour. After the first proof, the dough should be firm with bubbles on top. Depending on how much liquid you added, you should be able to pick it up in a ball, even if it is soft and floppy. If you break the dough apart with your hands, it should feel nice and bubbly.
Decant the dough into your lined Pullman pan and use a moistened hand to smooth down the top. Cover the tin with a tight fitting cover that won’t touch the loaf (I use an inverted produce bag) and allow to proof for an additional 1-2 hours (season dependent, see notes in body of post).
Preheat the oven to max temperature about 30-40 minutes before your loaf is ready to bake.
Your loaf is proofed when it domes nicely (but not too dramatically) over the top of the Pullman pan. The more liquid you add and the hotter your kitchen, the quicker your loaf will proof (see notes in body of post).
Place the loaf in the oven and turn the heat down to 220C/430F. Bake for 20 minutes, then turn the heat down to 200C/400F and bake for an additional 30-40 minutes. The top of the loaf should be golden brown and firm to the touch.
Remove the loaf from the oven and allow to cool for 20 minutes before carefully removing from the tin and transferring to a cooling rack. Allow to cool completely before slicing. Leftover slices keep well in an airtight container in the fridge and can also be frozen and defrosted (but are best as toast after defrosting).