Lemon Horseradish Butter

Every cook who looks for ways to perk up weeknight meals or make spur-of-the-moment entertaining easier ought to have a roll of flavored butter in his or her freezer. Just think: Grill a steak or a piece of fish and finish it with a slice of this horseradish butter. Roast some fingerling potatoes and dab them with the butter. Put it on a humble baked potato to dress up. Soften the butter, spread it on crostini, and top it with a slice of smoked salmon for an instant appetizer. Having this k