I make this recipe with plain yogurt instead of buttermilk (which I never have). I also sometimes substitue honey for maple syrup if I'm out. It's always a huge hit.

http://www.foodnetwork.com/recipes/nigella-lawson/buttermilk-roast-chicken-recipe/index.html

With chopped fresh dill, garlic and some lemon juice -- on top of broiled salmon. Delicious