You can make browned butter~— melt some butter (NOT margarine) in an iron skillet (it must be iron) and cook it until it turns brown. Don't wait too long, if you burn it too much it will turn black and lose the delicious taste. Serve as you would regular butter over veggies (it's GREAT on steamed cauliflower).

In Pennsylvania where I grew up, this is a very common thing, inspired by the Pennsylvania Dutch. I think it's used in French cooking also.