Miso Butternut Ramen

Name: Miso Butternut Ramen
Ingredients: 1 small butternut squash (1-2 lbs), peeled, seeded, and sliced in 1/2 thick rounds; 1-2 tablespoons olive oil; kosher salt; 1 tablespoon mirin; 1 tablespoon shaoxing wine (or sake, or sherry); 2 tablespoons miso paste (shiro or red, both are good); 2 tablespoons sugar; 4 cups good chicken stock; tamari, for seasoning the stock; 8 ounces buckwheat soba noodles; 2 tablespoons miso paste; 4 teaspoons rice wine vinegar; 4 small squares toasted nori; chile flakes, for topping; scallions, sliced thinly, for topping