Whisk the brown rice flour, cornstarch, and salt together
In a separate bowl whisk, the egg, honey, and soy sauce together.
Add egg mixture and sparkling water to dry ingredients.
With a spatula fold and mix the ingredients.
make sure to scrape the sides and bottom of the bowl.
Wash the scallion and remove the white ends.
Cut the scallions into 3 to 5 inch long chunks then slice in half.
Preheat a flatbottomed pan to medium/medium-low heat.
Add neutral oil then ladle in a quarter of the batter.
Evenly place a layer of halved onion on top and season with a pinch of salt.
Cook until the bubbles start to rise around the cake and the ends start to turn brown. Roughly a minute and a half to two minutes.
flip the cake and cook for another minute and a half to two minutes.
Repeat with the rest of the batter and enjoy.