Add to a large pot the soy milk, the nutritional yeast and the salt, and bring to a soft boil (pre-boiling temperature; around 80°C/175°F).
Turn off the heat and stir into the apple cider vinegar (or lemon juice) with 8 shaped movements 5 to 10 times (whilst stirring the milk will start to curdle, that's what we want).
Cover the pot with its lid and allow to rest for 10 to 15 minutes (up to 20).
The curds should be formed at this point, and they'd be floating over a yellow-ish liquid that is indeed the whey. Carefully collect the curds with a sieve and transfer to another sieve or drain, ideally coated with cheese cloth.
Leave to drain for half an hour or so, then transfer the mixture to a clean pot or bowl.
Make the soy cream by adding all the ingredients to a deep glass and blend to smooth with a stick blender.
Stir in the homemade soy cream until well distributed, and transfer the mixture to a ricotta cheese basket to drain overnight over a rack and under a small weight to help the drainage. Once drained we can eat the ricotta straight away, or use it in our favourite recipes or store in the fridge for up to 5 days.