From Just Food:
Butternut squash and apples are a classic combination, and this soup combines them perfectly.
Butternut Squash Apple Soup
1 yellow onion, chopped
1 rib of  celery, chopped
1 carrot, chopped
1 Tbsp butter
1 butternut squash,  peeled, seeds removed, chopped
1 tart green apple, peeled, cored,  chopped
(squash and apple should be at a 3 to 1 ratio)
3 cups vegetable or  chicken broth
Pinches of nutmeg, cinnamon, salt and  pepper