Blue Cheese Sauce

Directions

1. 1
   Pour the milk into a small saucepan and bring to a simmer over low heat.
2. 2
   Heat the butter in a medium saucepan over medium heat.
3. 3
   Add the onion and cook until soft, about 5 minutes.
4. 4
   Stir in the flour and cook for 1 minute.
5. 5
   Slowly whisk in the warm milk and continue whisking until the mixture thickens, about 2 minutes.
6. 6
   Season with the salt and cayenne pepper and continue cooking, whisking occasionally, for 5 minutes.
7. 7
   Remove from the heat and stir in the cheese.
8. 8
   If the sauce is too thick, thin with a little extra milk.
9. 9
   The sauce can be prepared 1 day in advance, covered, and refrigerated.
10. 10
    Reheat gently in a double boiler.
11. 11
    Sprinkle with the chives.