You need 1 ingredient. The key ingredients include: ["2 cups durum flour* or all-purpose flour", "3 large eggs", "2 ounces red beet, roasted for 30 minutes, cooled, peeled, pureed, and squeezed in cheesecloth to remove as much moisture as possible", "1/2 teaspoon freshly grated nutmeg", "3/4 cup freshly grated Parmigiano-Reggiano or Pecorino Romano", "semolina flour for dusting a sheet pan", "approximately 1/3 cup extra virgin olive oil", "1/2 cup chopped shallot", "1/4 cup chopped carrot", "1/4 cup chopped celery", "2 cups boneless lamb from the shoulder or leg, cut into 1/2-inch dice", "fine sea salt", "freshly ground black pepper", "2 tablespoons red wine vinegar", "1 cup red wine", "1 cup veal or chicken stock", "1 herb sachet: 2 garlic cloves, 1 bay leaf, 4 crushed juniper berries, and 5 peppercorns tied in a cheesecloth bundle", "1 cup peeled frozen chestnuts or chestnuts in natural juice", "2 cups peeled butternut squash in 1/2-inch dice", "1 fresh rosemary sprig", "1 fresh thyme sprig", "1 garlic clove", "2 teaspoons light brown sugar", "*The term durum flour means ""hard flour."" Also know as ""00"" flour, this Italian favorite is available from Italian grocers and specialty shops."].