You will need:
1 box Serapheena Vanilla Pound Cake mix +3 tablespoons Lime Juice +5 tablespoons Icing Sugar
Use a fine grater to zest 1-2 limes. Avoid the inner white part, as it is bitter. Then squeeze the lime juice.
Prepare batter as directed on the box then add 3 tbsp. lime juice and the zest.
Bake and cool as directed on the box.
Lemon Glaze: In a bowl place icing sugar and slowly mix in lime juice until a thick glaze is formed. Spread the glaze over the cooled cake. Decorate with lime rings.