36 hours before you want to bake bread, feed your potato flake starter so that it will be nice and bubbly.
After about 8 hours or so, when your starter is nice and active, add all of the ingredients except the sunflower seeds, to your stand mixer bowl.
Knead the bread until all of the ingredients are almost combined then add the sunflower seeds until incorporated.
Oil a large bowl and place the dough in it. Cover with plastic wrap to hold in the moisture.
Allow the dough to rise in a warm place for about 8-12 hours, or until doubled.
After the first rise, grease a bread pan, or line with parchment paper.
Shape the loaf by pressing into a rectangle and tightly rolling into a loaf shape. Pinch the seam and the ends together. Place into the pan and cover with plastic wrap.
Allow it to rise again for 8-10 hours.Once it has doubled, baste the top of the bread with an egg wash and sprinkle oats on the top. Lightly press down to help them stick.
Bake in a 350 °F oven for 25 minutes or until the top of the bread is golden brown and sounds hallow when thumped.