Valle d'Aosta-style polenta baked with fontina cheese and butter until bubbling. This vegetarian mediterranean mountain dish is a decadent family comfort food from Italy's smallest region.
Preheat your oven to 400°F (200°C) with a rack in the center.
In a heavy saucepan, bring water and milk to a gentle simmer over medium heat; stir in kosher salt.
Slowly whisk in the cornmeal in a thin stream, stirring constantly to prevent lumps. Lower the heat and cook, whisking often, until the polenta is thick and begins to pull away from the sides (about 30–35 minutes).
Remove from heat and stir in half of the butter and half of the fontina cheese until combined.
Spread half the hot polenta into a greased baking dish, layer with the remaining fontina, dot with half of the remaining butter, and sprinkle with half of the parmesan and black pepper.
Cover with the rest of the polenta, then top with remaining butter, parmesan, and more black pepper.
Bake for 20–25 minutes until golden and bubbling around the edges. Let rest for 5 minutes before serving.