Polenta with Porcini Mushrooms

The flavor, expense, and rarity of porcini mushrooms are incentives to look for a recipe where the mushrooms can shine and, more important, flavor the food it accompanies. This preparation from the Veneto region of northern Italy, where polenta is cooked in so many ways, is called polentina mantecata ai funghi porcini, and is perfect at fulfilling these requirements. This dish is extraordinarily satisfying and suited to cold-weather cooking in September and October, which is also por