This gyoza sauce recipe is for a single serving. You can scale the recipe and make small individual dipping bowls so that everyone can enjoy their own.You can use replace soy sauce with tamari for a gluten-free version.You can add other ingredients, such as hoisin sauce, oyster sauce, ponzu, or miso, to create a more complex flavor.You can also add some finely chopped green onions or sesame seeds to this recipe.Add more or fewer pepper flakes as per your heat tolerance. You can also use red chili powder, chili paste, chili oil, sriracha sauce, or sambal oelek instead of chili flakes.If the flavors are too strong, then dilute the sauce with some water.A little honey or maple syrup gives a subtle sweet taste to the sauce that also tastes good.The key is to experiment and find the right balance of flavors that suit your tastes.