Feed the sourdough starter 4-8 hours prior to making this recipe to ensure you have an active, bubbly starter to work with.
In the bowl of a stand mixer, whisk the 100 grams of active starter, 175 grams warm water, 1 egg, 2 tbsp honey and 57 grams melted butter.
Switch to the paddle attachment and add in 500 grams bread flour and 1.5 tsp salt. Mix on low speed for 8-10 minutes or until the dough is glossy and smooth. It will still be slightly sticky.
Grease a large bowl with butter and work the dough into a ball, then transfer it to the greased bowl. Alternatively, remove the dough from the bowl of the stand mixer, grease the mixer, and return the dough. Cover the dough with plastic warp and let it rise overnight or 8-10 hours.
The next morning, dump the dough out onto a floured work surface, then roll the dough into a log, tucking the ends under. Grease a 9x15 loaf pan and place the dough into the pan. Cover with plastic wrap or a damp tea towel and let the dough rise for 2-4 hours, or until the dough is slightly above the rim of the pan.
When the dough is ready, preheat the oven to 400 degrees F. Bake 35-40 minutes or until the dough is golden brown. Let the dough rest in the hot pan for a few minutes, then transfer to a wire rack.
Cool for one hour before slicing. Enjoy!