Method of Preparation

Sift flour—tie clove, chopped onion, bay leaf, and parsley stalks in muslin bag—measure milk, butter, mustard. Grate cheese.

Method of Cookery

1. Make roux with butter and flour; stir in milk off the heat, returning to heat after each addition.
2. Beat and add herb bag to sauce. Stand over a very low heat to infuse for 15 minutes.
3. Remove herb bag, season, add mustard, and stir in grated cheese until sauce is smooth.