1. In a small saucepan over medium heat, add the soy sauce, 1/4 cup water, rice vinegar, brown sugar, honey, garlic, ginger, sesame oil, and red pepper flakes. Stir well to combine all the flavors.

2. Bring the mixture to a gentle simmer while stirring occasionally. Allow it to simmer for 2–3 minutes so the garlic and ginger infuse the sauce with flavor and the sugar fully dissolves.

3. In a separate small bowl, mix 1 tablespoon cornstarch with 2 tablespoons cold water to create a slurry. Slowly pour the slurry into the saucepan while whisking continuously.

4. Let the sauce simmer for another 2–4 minutes, stirring constantly. It will begin to thicken and turn glossy. Once it reaches your desired thickness, remove it from the heat.

5. Taste the sauce and adjust as needed—add a touch more honey for sweetness or a splash of vinegar for tang. Garnish with sesame seeds and chopped green onions if using. Use immediately or let it cool and store for later.