From Cook's Illustrated. See this recipe for filet mignon.
2 Tbl unsalted butter, softened and separated into individual tablespoons
2 tsp fresh minced thyme
2 tsp fresh minced parsley
1 garlic clove, minced
1/8 tsp salt
In a small bowl, mash all ingredients together. Just before serving the dish, place a dollop on each item (eg steak, asparagus, etc) and tent with foil to help melt it.