Preparation Cook shallots, carrot, celery, tomatoes, thyme, and bay leaf in oil in a 4- to 5-quart heavy pot over medium-low heat, stirring occasionally, until softened, about 8 minutes. Add squash, water, nutmeg, 1 teaspoon salt, and 1/4 teaspoon pepper and simmer, covered, until squash is very tender, 20 to 25 minutes. Discard thyme and bay leaf. Purée soup in batches in a blender until smooth (use caution when blending hot liquids). Thin soup if desired and season with salt and pepper. Ladle soup over chestnuts in bowls. Cooks' note:Soup can be made 2 days ahead and chilled, covered once cool. Thin slightly with water if necessary.
Preparation Cook shallots, carrot, celery, tomatoes, thyme, and bay leaf in oil in a 4- to 5-quart heavy pot over medium-low heat, stirring occasionally, until softened, about 8 minutes. Add squash, water, nutmeg, 1 teaspoon salt, and 1/4 teaspoon pepper and simmer, covered, until squash is very tender, 20 to 25 minutes. Discard thyme and bay leaf. Purée soup in batches in a blender until smooth (use caution when blending hot liquids). Thin soup if desired and season with salt and pepper. Ladle soup over chestnuts in bowls. Cooks' note:Soup can be made 2 days ahead and chilled, covered once cool. Thin slightly with water if necessary.