I either buy fresh scallops, or the frozen sea scallops from Trader Joe's. They thaw fast enough that I can easily make this on a weeknight. I'm told some folks have problems with the sauce "breaking" if you are not careful whisking in the butter and keeping the sauce from getting too hot, but I have not. I usually serve this dish with rice and steamed spinach; the sauce goes well over just about anything. The chives are good, but I prefer the tarragon. My husband and I find that we can easily eat 1/2 lb of scallops.