Sift the wheat flour into a bowl, add the salt, sugar, olive oil, and the yeast dissolved in warm water.
Knead the dough with a stand mixer's hook attachment for 5-7 minutes, or by hand. Shape the dough into a ball and set it in a warm place for 1.5-2 hours.
Stretch the risen dough by hand on an oiled baking sheet to a thickness of 0.7-1 cm, without rolling it out. Press dimples into the whole surface with your fingers.
Brush the flatbread generously with olive oil on top, sprinkle with salt and your favorite spices, and add grated cheese, herbs, tomatoes, and olives to taste.
Let the focaccia rest in a warm place for another 30 minutes.
Bake for 20 minutes in a well-preheated 200 °C oven and serve warm.