Dissolve yeast in lukewarm water for 10 mins.
Combine dry ingredients.
Beat egg yolks.
Add the dissolved yeast then the dry ingredients.
Add the milk alternately with oil. Blend well.
Knead until smooth.
Let the dough rise for 1 hour or until double.
Preheat your oven.
Cut the dough into pieces about 1 inch thick.
Form into balls. Let rise for another 30 mins.
Brush the top with egg whites.
Bake in a well-greased pan for 25-30 minutes until golden on top.