Tonkatsu sauce is the Japanese equivalent to British brown sauce. You will find ready-made tonkatsu sauce in any Japanese grocery store, Asian food store or online. However, it’s not too difficult to make from scratch. Here is my quick, easy-to-prepare version. Try it with Okonomiyaki or Kushikatsu.
Mix the tomato sauce, Worcestershire sauce, mustard, soy sauce, sugar, lemon juice and salt in a bowl until well combined.
If you are making this to store, don’t add the sesame seeds at this stage. Store the sauce in the fridge in a clean, screw-top jar for up to a month.
Place the toasted sesame seeds in a suribachi or mortar and coarsely grind. Mix them into the sauce just before serving.
© 2020 All rights reserved. Published by Murdoch Books.