Combine sugar and hot water, stir until sugar is dissolved.
Add into the rice flour then mix until combined.
Knead until it forms a dough.
Add oil and continue kneading until dough becomes smooth.
Rest the Buchi dough for 20 minutes.
Mix 2 tbsp. Glutinous flour with water.
Set aside flour mixture, you will use this to stick sesame seeds to Buchi balls.
On a clean surface, dust with flour & roll the Buchi dough.
Divide dough into two and roll into a log.
Cut dough to 16 pieces, then form into a ball and set aside.
Flatten the ball dough and make a hollow in the center.
Fill it with Ube Halaya and seal the dough then roll again to form a ball.
Repeat the process until all dough are filled
Dip balls into the flour mixture and coat with sesame seeds
Continue the process until all balls are rolled with sesame seeds.