If you want this dessert to have a consistency more like porridge serve it hot or don't let it thicken that much when cooking.

Otherwise, let it cool down and put it in the fridge the consistency becomes more similar to pudding.

Pro tip:
In case you like to add some fruits, I'd recommend adding them when the pudding is done already.
Red berry compote goes great with it and you can easily prepare it by heating up frozen berries in a pot, adding some water & gelatin and boiling it until it thickens.  Then, let it cool down. Holds in the fridge for 1-2 weeks.

You may also try out one of the other optional ingredients, a combination of them or leaving out the cinnamon. I only sprinkled some cacao powder on top here and mixed it in with the spoon afterwards.

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.

You may also add a pinch of cinnamon or some pure cacao powder to the dough if you like.
For the cacao, I'd recommend using 1-2 teaspoons.

Another way to modify these cookies is adding about 1 tablespoon of low carb chocolate chips to the dough right in the beginning, simply sprinkle some on top before baking or making a chocolate frosting after the cookies are baked and cooled down.

You can check if the loaf is done by sticking a chopstick into it and pulling it out again. If there is no residue on the chopstick your liver meatloaf / liver bread is finished.

This recipe is very basic and you can modify it by adding ground beef, a diced onion, a minced avocado(minced in food processor before adding the liver) or some shredded cheese that you stir in with a spoon after mincing everything.

For a liver pudding, simply add a tablespoon of butter, 100g heavy cream & 250g ground pork/beef to the mixture and 2-3 bay leaves on top, before putting it into the oven.

Another idea would be to bake the mixture for about 20-30 minutes on a baking tray and using it as a pizza crust.

I simply added some mustard, low carb ketchup and cheese. If you want to you can go all the way to make sandwiches with the liver bread, with salad, cucumber, bacon, cheese and a fried egg - or whatever you prefer.

It is important to put the salad into the fridge for about 60 minutes to develop the aroma.

Basically, you can use as much cheese as you like, take less water or let the soup cook a while longer to make it as thick and creamy as you desire.

You need an immersion blender for this recipe.