Preheat oven to 350° F.
Place squash halves in a 9x13-inch baking dish cut side up. Sprinkle with salt and pepper and chopped sage. Pour the chicken or vegetable stock into the baking dish and scatter garlic around the squash. Cover with foil and bake for 45-60 minutes, or until tender.
Remove squash from oven and place top rack about 8 inches from broiler. Preheat broiler on high.
Transfer garlic to a small bowl and mash with a fork. Add heavy cream and 2 tablespoons of the liquid from the baking dish. Pour over the acorn squash . Broil until golden, about 3-4 minutes. Serve immediately.
Calories: 166kcal, Carbohydrates: 26g, Protein: 4g, Fat: 7g, Saturated Fat: 4g, Cholesterol: 22mg, Sodium: 99mg, Potassium: 834mg, Fiber: 3g, Sugar: 1g, Vitamin A: 1010IU, Vitamin C: 25mg, Calcium: 96mg, Iron: 2mg