In a small bowl, whisk together the soy sauce, mustard, rice vinegar, sesame oil, and honey.
This will form the foundational liquid for your sauce.
Add the grated ginger and minced garlic to the bowl.
These ingredients will provide extra flavor and a touch of heat.
Stir in the red pepper flakes to add a bit of spice to the mix.
If you prefer a milder sauce, use a smaller amount of red pepper flakes.
Combine the chopped green onions and sesame seeds in the bowl.
These elements will give the sauce a bit of texture and visual appeal.
Refrigerate the sauce for at least 30 minutes before serving.
Doing this allows the flavors to meld together and become more robust.