2 tb Butter
2 tb Flour
1 c  White wine
1 c  Buttermilk
3 tb Honey mustard
Salt, pepper

Put butter in top of double boiler. When butter is melted, add flour to
form a roux, then add wine, buttermilk and mustard. Stir until mixture
comes to desired consistency. If sauce is too thick, add a little milk (or
water). Season to taste.