Whisk the milk, chicken egg and egg white with a whisk (the yolk will be used later to make the dough shine) until smooth. Dissolve the dry yeast in the resulting mixture. Add half the volume of pre-sifted wheat flour, knead until smooth. Then mix the required volume in parts and knead the dough of a sufficiently strong consistency, but soft and elastic, not sticking to hands and dishes. Tighten the container with the dough with cling film or close the lid and leave for proofing in a warm place for 90-120 minutes. During this time, its volume should increase by 1.5-2 times.