Halibut with Anchovy Butter

The flavored butter here is hard to make in a small quantity, so you will have enough extra to stash in the freezer. People think a good bit about their pantry, all the canned and jarred and dried things that can make a meal out of nothing, but I hope they don’t forget about their freezer, which can swoop in to save the day when last-minute meals come up. Take this dish, which is centered on an irresistible compound butter flavored with capers, anchovies, and preserved lemon. You could make