# Add yolk and castor sugar
onto the margarine, which is softened at room temperature, and mix them with your fingertips.
# Add corn
starch and flour
into the mixture during the kneading.
# Divide the dough into 4 equal pieces.
# Add cocoa
into the first dough piece, add strawberry
juice powder into the second one, add blended or finely sliced spinach
leaves into the third one, keep the fourth one pure. Knead each of the dough pieces. Thus, you get 4 dough pieces, each has different colors as pink, green, brown and white.
# Pick walnut
sized piece from each of the big dough pieces. Shape each of them as pencil sized sticks.
# Collocate the sticks, get the ends of the sticks closer to shape it as crescent.
# Spread the remaining egg white over the cookie by a brush. After preparing all of the cookies by this way, place them onto the greased baking tray with some spaces between them. Bake them in the oven, which is preheated to 374 F. by keeping their original color fresh.