The Dreamiest Butternut Squash Risotto

Name: The Dreamiest Butternut Squash Risotto
Ingredients: One 2-pound butternut squash; 1/4 cup olive oil; Kosher salt and freshly ground black pepper; 6 cups homemade or store-bought chicken broth; 1 tablespoon chopped fresh sage plus 2 tablespoons small whole sage leaves; 2 cloves garlic, minced; 1 large shallot, finely chopped (about 1/4 cup); 6 tablespoons unsalted butter; 2 cups arborio rice; 1 cup dry white wine; 3/4 cup freshly grated Pecorino Romano (about 3 ounces), plus more for serving