Roasted Butternut Squash Soup with Sour Cream and Green Onions 2 to 3 pounds squash (butternut or your favorite winter squash), peeled and seeded 2 tablespoons unsalted butter 1 medium onion or 2-3 leeks, quartered 3 cloves of garlic, whole cloves skinned 1/2 bunch green onions, chopped 6 cups chicken stock 4 Tbs. sour cream