# Add egg white and yogurt
to the soften margarine at room temperature, and mix well. Add baking powder, salt and flour
slowly and knead until it turns a smooth dough.
# Close the dough and let stand for half an hour.
# At the end of the time pick walnut
sized pieces from the dough, make rounds and flatten between your palms.
# Place on the greased oven tray, spread the yolk of the egg on them. Mix the crushed red pepper
and mozzarella and put this mixture on them as pinches.
# Bake in the 175 C (F 347) oven until they turns the golden medal color (20 minutes). Let cookies stand for a while for cooling down and serve.