Preheat your oven to 250C/482F or the highest possible setting if your oven doesn't go that high. Grease and line your steel USA pan Pullman pan (23cm X 10cm X 10cm or 9 X 4 X 4 inches). I like to create handles with the baking paper so I can easily lift the loaf out later. I also use bulldog clips to secure the baking paper in place while I add the dough to the pan.
Whisk the dry ingredients together in a large mixing bowl.
Add the maple syrup and melted butter and stir a little to loosely incorporate it. Add 600-700g water while whisking as the dough firms up quickly.
Once the dough becomes too stiff to whisk, get one hand into the dough and squelch the dough through your fingers, stirring and picking up any dry flour into the dough as you work.
You are looking for dough that feels moist and cohesive with no dry bits in the bowl. If you squish a piece of dough in your hands, it should feel cohesive and snack out of your hand like a wet dough would.
If your dough feels fluffy and squishes out of your hand in a slightly chunky or non-cohesive way, add more water. All of my tests needed around 750-800g water, but this will depend on your flours (see notes in the body of the post).
Once you are happy with the consistency of the dough, transfer it to the lined Pullman pan. Use a moistened hand to smooth down the top of the loaf thoroughly.
Remove the bulldog clips if you have used them and place the bread in the oven for 40-50 minutes. If you have made the version with butter, it should be lightly golden on top. If you have made the oil version, it will be quite pale.
Allow the loaf to cool in the tin for 15-20 minutes and then transfer it to a cooling rack. I find that this bread stales quite quickly on the bench - I recommend slicing it and freezing it on a tray, then transferring the frozen slices to an airtight container. I toast the bread straight from frozen.