Stuffed Acorn Squash With Barley for Two

Name: Stuffed Acorn Squash With Barley for Two
Ingredients: 1 acorn squash (1½ pounds), halved pole to pole and seeded; 2 tablespoons extra-virgin olive oil; Salt and pepper; ¼ cup pearl barley; ½ fennel bulb , stalks discarded, bulb cored and chopped fine; 1 shallot , minced; 3 garlic cloves , minced; ½ teaspoon ground coriander; ¼ teaspoon minced fresh thyme or pinch dried; 1½ ounces Parmesan cheese , grated (¾ cup); 2 tablespoons minced fresh parsley; 2 tablespoons pine nuts , toasted; 1 tablespoon unsalted butter; Balsamic vinegar