Combine all the ingredients except for the sesame seeds and mix well.
Microwave for 30 seconds.
Add the ground sesame seeds.
Mix together and it's done!
Story Behind this Recipe
We don't have a lot of "tonakatsu" (breaded pork cutlet) in our family. It's wasteful to buy tonkatsu sauce! I tried out many formulas, and came to this delicious recipe.
I don't have any hints really. Adjust the ingredient amounts to your taste. If you mix all the ingredients listed together, it should taste like tonkatsu sauce. The more sesame seeds you add, the better the sauce tastes.