In a small sauce pot whisk together the water, nutritional yeast, turmeric and cornstarch.
Place over medium heat, add the vegan butter and stir until you see the sauce change to a shiny dark yellow texture that resembles egg yolk, about 5 minutes.
Remove from heat and stir in kala namak ¼ teaspoon at a time to desired saltiness. Enjoy!
Notes
Storage- Leftover yolk can be stored in a sealed container in the fridge for up to 5 days. Before enjoying, reheat the sauce on the stove stirring well to freshen it back up.