Golden polenta topped with a rich mushroom ragù is classic northern Italian vegetarian fare. This fresh mediterranean dish is a family comfort food that highlights seasonal wild mushrooms.
In a large saucepan, bring 4 cups water, 1 cup whole milk, and 1 teaspoon salt to a gentle simmer over medium heat.
Gradually whisk in the cornmeal in a thin stream, stirring constantly to prevent lumps. Reduce heat to low and cook, stirring often, until thick and creamy, about 30 minutes.
While the polenta simmers, heat 2 tablespoons olive oil and 1 tablespoon butter in a large skillet over medium-high heat until shimmering. Add the chopped shallot and cook for 2 minutes until softened.
Add the sliced wild mushrooms and sauté for 8–10 minutes, stirring occasionally, until the mushrooms release their moisture and become golden brown. Stir in 1 teaspoon thyme leaves and season with black pepper.
Spoon the creamy polenta onto plates, top generously with the mushroom ragù, and finish with a sprinkle of grated Parmesan. Serve warm for best texture.