# Put the yeast, warm water, yolk and
sugar into a deep and large bowl. Mix it until the
sugar and the yeast dissolves totally.
# Add 2 cups
flour and salt in it, start to knead it.
# After adding vegetable oil, add the remaining
flour in it. Make the dough not to stick to your hands.
# Cover the dough and rest it for half an hour.
# Pick
lemon sized pieces from the rested dough. Roll them into bars, which are thicker than pencil (about 2 inches thickness).
# Place the cookies onto the greased baking tray with some spaces between them. Rest them over the tray for 20 minutes.
# Whisk the egg white gently for a while and spread it all over the cookies by a brush. Sprinkle sesame all over.
# Place the cookies into cold oven.
# Set the heat to 374 F, and bake the cookies for about 35 – 40 minutes.
# Turn off the oven and cool the cookies down in the oven without opening the door of the oven.
