Grate enough zest from lemons to get 2 tablespoons.
Squeeze lemons 'til you get the 1 cup needed.
Separately, in a microwave proof bowl, beat butter and sugar with an electric mixer 'til blended.
Beat in eggs, 1 at a time, blending just until incorporated.
Slowly add lemon juice, beating at low speed until blended.
Stir in lemon zest.
(At this point, it will look curdled.)
Microwave Method:
Microwave at high for 5 minutes, stirring once every minute.
Then microwave a little longer, stirring at 30 second intervals, just for 1-2 more minutes.
Lemon curd will thicken and coat the back of a spoon, and start to mound slightly.
Cover warm curd with plastic wrap directly on it (to prevent a film from forming).
Chill a minimum of four hours or 'til firm.
Refrigerate in airtight container for up to 2 weeks.
Stove-top Method:
Cook in a heavy saucepan over medium heat.
Whisk continuously for 14-16 minutes.
Lemon curd will thicken and coat the back of a spoon, and start to mound slightly.
Cover warm curd with plastic wrap directly on it (to prevent a film from forming).
Chill a minimum of four hours or 'til firm.
Refrigerate in airtight container for up to 2 weeks.