Fermenting food araises new layers of flavor when properly done :)
I'm not much of a cooker but it seems worth to give it a shot. Have you ever tried fermenting pineapple?

My mom has a rather easy recipe for it:

First, the pineapple peel is cut and sealed for three days in a base with drinking water.

After three days, the contents of the container are emptied into a pot and heated until it boils.

Next, the content of the pot is strained to discard the remains of the shell.

The liquid obtained is cooked over low heat with cornstarch until it thickens. You add as much sugar as you like (taste the preparation in order to know the exact point) and you also may add some clove.

This is a summer drink, I usually drink it very cold... but I think you may try it a little warm due to the winter time lol.

Off topic, you did write some practices of the Chinese course. But you didn't post them on Whaleshares. Here I can only reward you with SBI shares. Do you want them?