Homemade lemon curd lends bright flavor to desserts. These tips will help you prepare a perfect curd every time: Use a double boiler, which provides gentle heat, and stir constantly; this prevents the eggs from cooking too fast. Whisk in the butter 1 piece at a time, letting it melt before adding more. To ensure a silky-smooth texture, pass the curd through a fine-mesh sieve.
In the top pan of a double boiler, combine the egg yolks and sugar and whisk vigorously for 1 minute. Add the Meyer lemon juice and lemon zest and whisk for 1 minute more. Set the top pan over but not touching barely simmering water in the bottom pan and cook, stirring constantly, until thickened, 10 to 15 minutes. Add the butter, 1 piece at a time, whisking until melted before adding more.
Remove the pan from the heat. Pour the curd through a fine-mesh sieve set over a bowl, pressing the curd through with a rubber spatula. Cover with plastic wrap, pressing it directly on the surface to prevent a skin from forming. Refrigerate for at least 2 hours or up to 3 days. Makes 2 cups.