Chestnut Puree

Directions

1. 1
   Cook onion in butter in a 3-quart heavy saucepan, covered, over moderately low heat, stirring occasionally, until softened, about 7 minutes.
2. 2
   Add chestnuts and stock and simmer, covered, 10 minutes.
3. 3
   Puree mixture in batches in a blender until smooth (use caution when blending hot liquids) and transfer to a small saucepan.
4. 4
   Heat puree over moderate heat, stirring, until hot and season with salt and pepper.