Crespella's Lemon Curd

Beat together the lemon juice, sugar, eggs, egg yolks and lemon zest in a glass bowl. Place the bowl over a pot of simmering water, without touching the water, and whisk continuously until the mixture thickens, about 20 minutes. Remove from the heat and whisk in the butter. Let cool and refrigerate for best taste. NotesThis recipe was provided by a chef, restaurant or culinary professional and may have been scaled down from a bulk recipe. The Food Network Kitchens chefs have not tested this recipe, in the proportions indicated, and therefore, we cannot make any representation as to the results.