In the bowl of a stand mixer with the dough hook, or in a large mixing bowl by hand, mix the water with the yeast, the sugar, and half the flour. Let bubble for 10-15 minutes.
Add the riced potatoes (cooled to room temperature) and mix well. Add the rest of the flour and the salt and knead until the dough comes off of the mixer bowl wall (about 5 minutes)
Cover with a clean kitchen towel or plastic wrap and let rise for 45 minutes to 1 hour in a warm place.
Turn the dough out onto a lightly floured work surface and roll it out into a square. Bring the corners to the middle. Repeat and flip onto a piece of parchment paper.
Let it rise for another 20-25 minutes on the counter, covered with the kitchen towel or plastic wrap.
Preheat your oven and the Dutch oven (with lid) to 435 degrees Fahrenheit (225 degrees Celsius).
When your bread is done the second rise, remove the pot from the oven, add 3/4 cup warm water to the bottom and, on top of the water, add the bread with the parchment paper. Be careful so that the water doesn’t go up on the parchment paper and get the dough wet.
Score your bread. You can chose to score it in a cross pattern, or make three parallel lines or just get creative. Make sure you have at least one big score of about half an inch (1 cm) deep on the surface of the bread.
Put the lid on and bake at 435 degrees Fahrenheit (225 degrees Celsius) for 20 minutes.
Remove the lid, lower your oven temperature to 400 degrees Fahrenheit (200 degrees Celsius) and bake your bread for another 20-25 minutes.
Let the bread cool completely (remove it from the pot right after it's done, to a wire cooling rack) and slice it only after it's cooled to room temperature.