Polenta is a dish of boiled cornmeal. It may be consumed hot as a porridge or allowed to cool and solidify into a loaf, which is then baked, fried, or grilled. As it is known today, polenta derives from earlier forms of grain mush (known as puls or pulmentum in Latin or more commonly as gruel or porridge), commonly eaten since Roman times. Before the introduction of corn (maize) from America in the 16th century, polenta was made with such starchy ingredients as farro, chestnut flour, millet, spelt, and chickpeas. Let's find out how to make polenta with mushrooms.