Fresh chestnuts:
Score on flat side, put in boiling water, re-simmer, draih
Sheet pan: Bake @ 425F for 15 minutes, put in a bowl, cover with a cloth for 15
minutes. Peel.
Heat bacon in a 6-qt. saucepan over medium-high heat; cook, stirring
occasionally, until fat is rendered and bacon is almost crisp, 3–4 minutes.
Add butter, shallot, carrot, leek, and celery; cook, stirring
occasionally, until vegetables are soft, 5–7 minutes.
Add stock, chestnuts, bay leaf, and thyme; bring to a boil. Reduce heat to
medium; cook, slightly covered, until chestnuts are very tender, about 25
minutes. Remove from heat and let cool slightly.
Discard bay leaf and thyme. Working in batches, purée soup in a blender
until smooth. Return soup to saucepan and place over medium heat. Stir in cream,
nutmeg, salt, and pepper; cook until soup is slightly thick, about 5 minutes
more.