Tofu katsu is best enjoyed fresh while it’s hot and crispy, although it can be stored in an airtight container in the refrigerator for several days. Leftover katsu can be enjoyed chilled or reheated in a pan or oven Katsu sauce can be prepared in advance and stored in the refrigerator for up to 4 days.
The veggies should be kept plain but the sauce should provide enough flavor to coat and season everything If you want to decorate the cabbage, mixture Toss with 2 tablespoons each rice vinegar, soy sauce, mirin, and oil along with 1/2 tablespoon sesame oil and 2 teaspoons sugar, followed by shredded cabbage.