Winter Squash Soup

Ingredients

• 1/2 cup butter
• 2 medium onions, sliced
• 1 leek, well rinsed, sliced
• 2 large garlic cloves, lightly crushed with flat of knife
• 1 tart cooking apple, pared, cored, sliced
• 1 teaspoon chopped fresh thyme or 1/2 teaspoon dried thyme
• 1 bay leaf
• 1 butternut squash, about 3 lbs., pared, seeded, cut into 1-inch cubes
• 2 sweet potatoes, pared, cut into 1-inch cubes
• 6 cups chicken broth
• 1/2 teaspoon ground allspice
• 1/8 teaspoon ground cloves
• 1 piece cinnamon stick (about 1 inch)
• 1/2 cup half-and-half
• 1/2 cup heavy cream
• 1/2 cup sour cream
• 1 cup frozen baby peas, thawed
• salt & freshly ground black pepper
• 2 tablespoons finely chopped parsley
• 2 scallions, thinly sliced on diagonal