I'm the same as Danni, except I don't use stock but I put in 2 bay leaves and about 10 peppercorns in with it. I think in the slow cooker I use 1 cup of water.

Started a thread ages ago asking for white sauce recipes and a couple of people gave me fab ones. If you really want to go the whole hog, cook up a basic white sauce and add chopped onions, a tablespoon of seeded mustard and a small handful of cheese. Yummo!