Suggestion
Serve this sauce with Horseradish-Crusted Salmon

1. Place the first 6 ingredients into a heavy saucepan; reduce over medium heat until one-third of the liquid remains;
2. add the cream and heat until foamy; whisk in the butter; 
3. strain, pressing well to extract all the flavors; keep warm over a water bath; 
4. in a small bowl, combine the whole-grain mustard, horseradish and cream; 
5. whisk into the sauce; 
6. place again over the water bath; add the herbs and keep hot until serving time.