Every now and then, I get a yearning for a bit of warm, smooth, buttery-lemony hollandaise sauce to dip artichoke leaves into, to top a poached egg with so that I can enjoy that delicious flavor play of eggs Benedict, or to spread over a piece of grilled salmon—or other fish. But to make a small amount for just one or two servings of this tricky sauce (and then reheat what’s leftover)? Impossible, the pros would say. However, where there’s a will, there’s a way. So I experimented and managed to work out a method that served my purposes beautifully. Here it is.