In a pot put water and salt to boil, sprinkle a tablespoon of corn flour. When water begins to boil add corn flour - while stir well with a whisk.
Let it boil on medium heat, stirring with whisk it periodically, about 3-4 minutes. As mamaliga simmer (about 10min) mix it. After this press it well.
Brush top with a little butter. Leave on low heat 5 minutes. Serve it on a wooden board. Cut it with simple sewing thread.