Knead a soft dough that does not stick to your hands (try not to clog the dough with flour, lubricate your hands with vegetable oil).
At the end of the kneading, pour vegetable oil into the dough, mix it, form a ball and put the dough in a bowl (lubricate it with vegetable oil). Cover the bowl or tighten with cling film. Put in a warm, draughty place for 1 hour.