Lemon Curd (Stove Top or Microwave Method) Lime or Orange Curd

"A British tea time favorite. This is sweet and tart. Try it on scones, muffins, and tea breads or layer on Angel Food cake with Raspberries and Creamy Cheesecake! I've also microwaved this just watch and stir a lot. For orange or lime curd, substitute appropriate fruit rind and juice. Proceed as directed. FYI- When filling a cake with this be sure to pipe a rim of frosting on the edge of the first layer, then fill inside with the chilled lemon curd, place top layer then frost...."