I bought some thick steak fillets the other night and was going to serve them with a peppered sauce and creamed spinach. I still made the creamed spinach as we have not had it in a while and I knew my hubby would like it as it is a favorite of his. I noticed I had some tarragon to use up and new I would not be making anything to use it in over the next few days, so I came up with this sauce, to utilize it. The sauce turned out surprisingly well and we both enjoyed it very much, instead of cooking the onions I was using up in the sauce. I sliced 2 onions thinly and fried them separately and placed them on top of the steak.