Ingredients
1/2 stick unsalted butter
Add squash to skillet and cook over medium heat, stirring occasionally,
until golden and just tender, 6 to 8 minutes. Add radicchio and 1/2 teaspoon
each of salt and pepper and cook, stirring, until wilted and just tender, about 3 minutes.
Meanwhile, cook pappardelle in a pasta pot of boiling salted water
(2 tablespoon salt for 6 quarts water) until al dente.
Reserve 1 cup cooking water, then drain pasta. Add pasta to radicchio mixture with 1/2 cup
cooking water and toss over low heat until heated through, 1 to 2 minutes.
Add more cooking water to moisten if necessary.
Serve topped with nuts and cheese.