Preparation Whisk together juice, zest, sugar, and eggs in a 2-quart heavy saucepan. Stir in butter and cook over moderately low heat, whisking frequently, until curd is thick enough to hold marks of whisk and first bubble appears on surface, about 6 minutes. Transfer lemon curd to a bowl and chill, its surface covered with plastic wrap, until cold, at least 1 hour. Cooks' note:Curd can be chilled up to 1 week.
Preparation Whisk together juice, zest, sugar, and eggs in a 2-quart heavy saucepan. Stir in butter and cook over moderately low heat, whisking frequently, until curd is thick enough to hold marks of whisk and first bubble appears on surface, about 6 minutes. Transfer lemon curd to a bowl and chill, its surface covered with plastic wrap, until cold, at least 1 hour. Cooks' note:Curd can be chilled up to 1 week.