To make it even better, you may prepare & marinade the meat in the morning or one day in advance and let it soak in the seasonings for a longer period of time. Simply let it stand for 1-2 hours or longer instead of 10-15 minutes. If you prepare it a day in advance, put the bowl into your fridge and cover it with cling film.

The seasonings are amazing for marinading  pork chops or spice up some ground beef, too.
In addition, you could use pork loin instead of ham or try it with other cuts.

Serve with any keto friendly side dish you like, e.g. salad, fried / baked vegetables, some eggs or simply a low carb condiment.

If you want to render the kidney fat cut it into small bits or mince it in a food processor.
Then, put it into a pot or big pan on low heat and wait for all the fat to get out while stirring occasionally.

You can see that it's done when there is clear fat on the bottom with crispy bits on top.

Now, you can remove these floating bits by pouring all content through a cheesecloth or fabric into another pot.
When the fat is cooled, pour it into mason jars and keep them in the fridge.

Take care not to add too much salt, because the soy sauce is pretty salty already.

As a side dish, I like to simply cook some eggs or vegetables.