Soak the salted egg yolk in vegetable oil over night
bake it 180 degree over 5 minutes
Water Dough ingredient :Flour 90g, unsalted butter 30g, fine sugar 13g, water 38g
continue mixing until the dough until shiny and smooth
cover it with warping paper
Oil Dough ingredient : flour 75g , unsalted butter 38g
cover it to prevent dehydration
Divide red bean paste into 10 portion (25g each portion)
after rest 30 minutes , water dough ready to use
divide water dough into 10 portion, each 18.3 g
cover it with warping paper
Oil dough , divide into 10 portion  (10 g each)
took out water dough
warp oil dough into water dough
use rolling pin to roll it into a tongue shape
cover it with warping paper to prevent dehydration
second rolling, flatten it gently and roll with roller pin
cover it & rest about 15 minutes
Final  roll , fold it from one side, the both end side face up and flatten it with hand before rolling
Brush beaten egg yolk on the top
Sprinkle some black sesame seed on the top
Bake for a 180 degree for a 30 minutes
That it, ready to serve Yummy dim sum
