Preparation In a heavy saucepan bring water and salt to a boil and gradually whisk in cornmeal in a thin stream. Cook polenta over moderately low heat (it should be barely boiling), stirring constantly, until very thick and pulls away from side of pan, about 40 minutes for cornmeal and about 15 minutes for instant polenta. Remove pan from heat and cover to keep warm. Stir polenta just before using. Polenta will keep warm, covered, about 20 minutes.
Preparation In a heavy saucepan bring water and salt to a boil and gradually whisk in cornmeal in a thin stream. Cook polenta over moderately low heat (it should be barely boiling), stirring constantly, until very thick and pulls away from side of pan, about 40 minutes for cornmeal and about 15 minutes for instant polenta. Remove pan from heat and cover to keep warm. Stir polenta just before using. Polenta will keep warm, covered, about 20 minutes.