Sift the flour, mix with salt and sugar.
Pour water with yeast into the flour. Knead the dough in the bowl of a food processor. The dough at this stage turns out sticky and viscous, it is problematic to work with it, knead by hand, but you do not need to add flour.
Add soft butter to the dough and knead the dough for 10-12 minutes until it becomes sufficiently elastic and plastic. It is much more convenient to work with him.