KEY LIME CURD

Why I Love This Recipe
I like this occasionally instead of lemon curd for tarts and cake fillings.
Ingredients You'll Need
1/2 cup plus 1 tbsp. sugar
3 tbsp. unsalted butter (cut in pieces)
2 tbsp. Key lime juice
in the top of a double boiler; set over simmering water.
Stir until sugar dissolves and butter melts.
Beat 1 large egg, 1 large egg yolk and 1 tsp. shredded lime zest (colored part only) in a small bowl.
Directions
Gradually whisk warm butter mixture into egg mixture.
Return mixture to double boiler.
Cook over simmering water, stirring constantly, until curd is thickened, about 10 minutes.
Do not boil.
Transfer to small bowl.
Press plastic wrap directly onto surface and chill until cold.