Making Kimchi paste: Make porridge Put ½ cup of sweet rice flour and 3 cups of water into a skillet and mix them up. Then cook over medium-high heat, stirring constantly. When you see some bubbles, pour ¼ cup of sugar into the porridge and stir one more minute. Then cool it down. Place the cold porridge into a big bowl. Now add all your ingredients one by one. Add fish sauce, hot pepper flakes, crushed garlic, ginger, and onion.