Steam the sweet potato until it get soft throughly,take it out and use a spoon to crush it.you can also use pumpkin or purple sweet potato.

Add some suger and glutinous rice flour,mix and make them to a ball,then put it aside for a few minutes.

Divide the ball into small balls,and make each balls to cakes.

Put the sesame breeds on the surface.

Put some butter,when melt,put the cakes in,use a low heat to cook,turn it over for few time in case it get black.