-
Grease 6 3/4 cup ramekins or custard cups. Sprinkle 2 tablespoons of the sugar evenly over ramekins. Place on baking sheet; set aside.
-
In saucepan, melt butter over medium heat. Whisk in flour and cook, whisking, for 1 minute.
-
Whisk in milk until smooth; cook, whisking, until thickened, about 2 minutes. Remove from heat.
-
Whisk in half of the remaining sugar and the lime rind. Whisk in egg yolks, 1 at a time. Return to heat and cook, whisking, until thickened, about 2 minutes. Remove from heat. Whisk in lime juice. Transfer to large bowl.
-
In separate bowl, beat egg whites with cream of tartar until soft peaks form. Fold one-quarter into yolk mixture; gently fold in remaining whites.
-
Divide among prepared ramekins. Bake in center of 375°F oven for about 15 minutes or until puffed and almost firm to the touch.
-
GARNISH: Dust with icing sugar. Serve immediately.