6: Drain and place the grated potatoes on a kitchen towel, then dry them carefully by enclosing them in the towel. Set aside.
7: Do the same with the onions.
8: Pour 330 g water into a bowl, then whisk in 300 g flour. The consistency should be roughly that of pancake batter, and if necessary, adjust the weight of water.
9: Pour the potatoes and onions into the mixture, and mix well. Add the grated Comté cheese, 50 g breadcrumbs, salt and pepper. Preheat oven to 200°C (390°F).
11: Spread the mixture over the entire baking sheet in a thin layer. Drizzle with olive oil...
12: ...and bake for approx. 30-40 minutes at 200°C (390°F), watching for browning at the end.
13: Cut into small pieces, and enjoy preferably warm or hot.
Remarks
You can set aside a tablespoon of grated Comté cheese and sprinkle it over the scarpaccia just before baking. Of course, to be more in the Italian spirit, replace the Comté with Parmesan or Pecorino.