First, mill your wheat berries on the fine setting of your grain mill.
Warm the water to 95-105 degrees F.
In the bowl of stand mixer, add the water, potato flake starter, oil, honey, and egg. Mix well.
Add the flour and salt and start mixing. Mix on speed 1 just until the dough comes together and is shaggy.
Cover the bowl and let the dough soak or autolyse for 30 minutes.
Knead on speed 2 for 6-8 minutes.
Place dough in a lightly greased bowl and cover with plastic wrap or a bowl cover.
Let this dough ferment at room temperature for 6-12 hours or until the dough has visibly risen. This dough can go for up to 24 hours in a very cool room.
Prepare your loaf pan by spraying with olive oil or lining with parchment paper.
Turn the dough onto a lightly floured surface and shape into a loaf shape.
Place the dough into the loaf pan and cover with plastic wrap.
Let the dough rise an additional 3-4 hours or until the dough tops the rim of the loaf pan.
Preheat the oven to 375 degrees F.
Bake for 35 minutes in the preheated oven.
Let the loaf cool completely on a wire rack before slicing.