6 ounces portabella mushrooms, cleaned and trimmed
1 stick unsalted butter
1 teaspoon kosher salt
½ cup white wine
One cup of Chicken broth
2 cups finely shredded radicchio
2½ cups heavy cream
½ cup freshly grated Parmigiano-Reggiano
½ cup coarsely shredded fontina
½ cup crumbled Gorgonzola
2 teaspoons mascarpone cheese
6 leaves fresh sage, chopped
1 pound conchigliette rigate (pasta shells)

Preheat the oven to 500 degrees F. Bring a pot of salted water to a boil. Slice the mushrooms about ¼-inch thick. Heat 6 tablespoons of butter in a large skillet; add the mushrooms and ¼ teaspoon salt. Sauté over medium heat, add half cup of dry white wine stirring frequently, add one cup of chicken broth until they are cooked through, 15 to 20 minutes. In a large mixing bowl, combine the mushrooms, radicchio, cream, cheeses, sage. Parboil the pasta shells for 4 minutes; drain and add to the ingredients in the mixing bowl. Toss to combine. Divide the pasta mixture among 6 to 8 individual, shallow, ceramic gratin dishes (1½ to 2 cup capacity). Dot with the remaining 2 tablespoons of butter and bake until bubbly and brown on top, about 7 to 10 minutes. Garnish with fresh Italian parsley, but do not cook the parsley in the pasta.