Pour the water into a heavy pot (like a Dutch oven) and add the salt. Bring to a boil.
Once boiling, slowly sprinkle in the cornmeal in a thin 'rain' while whisking continuously.
Reduce heat to low and continue whisking for 1–2 minutes until the mixture thickens.
Cover with a lid and let the mamaliga simmer for 10 minutes.
Optional: whisk in a tablespoon of butter for a creamier texture.
For a soft mamaliga, serve now.
For a firm, sliceable mamaliga: Turn off the heat and let it rest, covered, for another 10 minutes.
Turn the heat back on for 1 minute, then switch off again.
Replace the lid with a wooden board, flip the pot upside down, and let the mamaliga slide out.
Cut using string (traditional Romanian method) and serve warm.
