In your blender mix all base ingredients + your choice of the flavouring ingredients til you have a smooth mixed liquid. The resulting mixture will still be quite thin, but don't worry it will thicken up during the steaming process.
Pour your mixture in a heatproof glass or ceramic container. Make sure you leave about 1 cm of space in the container cause the liquid will expand during the steaming process.
Place your container with the mixture in your steamer. Do this right away after blending and pouring your mixture in your container. Don't let it sit around for a little while cause the mixture could start to separate - I did this once and noticed afterwards there were parts of the cheese that were harder, I suspect because the rice flour clumped together while it was sitting there before steaming.
Steam for 45 minutes (make sure there's enough water in the steamer that you can steam for 45 minutes without a problem!)
After 45 minutes remove the container with the steamed cheese from the steamer. It will already thickened up a lot. Let it cool for a while at room temperature.
When it has cooled down you can place it in the fridge til at least the next day.
The next day you can remove the cheese from the container by loosening up the sides of the cheese with a spatula or knife. It should be relatively easy to get the cheese out, though sometimes you have to keep on loosening up those sides before the bottom finally releases.
Have a taste and enjoy!