Risotto con Radicchio Trevigiano e Ubriaco Risotto with Radicchio Classic Foods from Treviso

Name: Risotto con Radicchio Trevigiano e Ubriaco - Risotto with Radicchio, Classic Foods from Treviso
Ingredients: About 6½ cups (1.5 l)vegetable stock; 2 tablespoons (30 ml) extra virgin olive oil; 1 tablespoon (25g) butter; 1 onion, chopped into ¼ inch dice; 1 stalk celery, chopped into ¼ inch dice; 1 clove garlic, minced; 1 head radicchio, cored and cut into thin strips (chiffonade); 2 cups (0.5kg) risotto rice, preferably vialone nano, carnaroli, or arborio; ½ cup (0.125l) prosecco or white wine; ¾ cup (135 g) grated ubriaco cheese; Kosher salt and freshly ground pepper; ½ cup (80g) toasted chestnuts; 8 basil leaves, cut into thin strips (chiffonade)