Squash and Apple Soup

Recipe adapted by Marian Burros from Out of the Earth, from The New York Times Country Weekend Cookbook

(makes about 10 cups)
3 lbs. winter squash like butternut, buttercup, delicata or hubbard, halved and seeded
olive oil
3 carrots, peeled
2 medium onions, halved but not peeled
salt and pepper
5 cloves garlic, peeled
4 apples, cored but not peeled, cut into 1/2-inch cubes
1b. red or white potatoes, peeled, cut into 1/2-inch slices
2 large sprigs thyme
2 quarts chicken or vegetable stock

Preheat the oven to 400˚. Place the squash cut side down on a baking sheet lightly coated with olive oil, salt and pepper. Toss the onions and carrots in a little oil and salt and place around the squash or on another baking sheet. Roast the vegetables until tender, squash - about 1 hour, onions and carrots - about 40-50 minutes. Scoop the flesh from the squash and place in a 6-8 qt. pot with the carrots. Peel the onions and add along with garlic, potatoes, apples, 2 sprigs thyme and stock. Bring to a boil and then lower the heat and simmer until potatoes are falling apart tender, about 30 minutes. Puree the soup in batches; return to the pot and season with salt and pepper. Reheat slowly before serving. The soup may be refrigerated or frozen; add a little water or stock when reheating.