Dissolve the yeast in a little warm water, a pinch of sugar and a few drops of vinegar. Add a little flour, mix it up and let it rise in a warm place. Once effervescent, add all the other products to it and knead a smooth dough. It needs to be smooth and homogeneous.
Cover it with a cloth and leave it to rise well in a warm place, until doubled in volume. Knead again with a little flour and shape it into a long strand with your hands. Weave the strand like a plait. Put it in a warm place to rise once more for about 20 minutes.