Rinse 2 cups of glutinous rice until the water runs clear (4-5 times). Add the rice to a bowl and fill it with water until it just covers the rice. Let the rice soak for 4 hours or overnight. If at any point, the rice starts to look too dry, add more water. Place the bowl in the fridge if soaking overnight.
The next day, drain the rice and set aside.
Strain 1 cup of Gac paste to get rid of excess liquid.
Add the Gac paste to a bowl with the glutinous rice, 2 tbsp of sake, and ½ tsp of salt. Stir until well combined.
Prep your steamer by bringing water to a simmer and adding the steamer insert. Place a sheet of parchment paper on top of the steamer insert. I like to poke holes in the parchment paper to help the steam come through.
Scoop the rice into the steamer, and steam for 20 minutes until rice is cooked through. Once done, try a little to test for doneness and continue cooking if it needs more time.
Add 4 tsp of granulated sugar and mix until combined.
Break down 2 tbsp of black sesame seeds with a mortar and pestle. If you don't have one, use a bowl and the back of a knife.
Combine the black sesame with 1 tsp of granulated sugar and a pinch of salt.
Serve rice with black sesame topping. Enjoy!