1 cup softened butter
1cup sugar, plus extra for rolling dough in sugar
1/2 teaspoon baking soda
2-1/3 cups all-purpose flour
1 tablespoon grated lime rind
3/4 teaspoon ground ginger
Put butter and sugar in a medium-sized bowl and cream until light and fluffy. Add egg and beat until incorporated. Then add baking soda and flour little by little.
Then add grated lime peel and ginger. Roll dough into balls and roll the balls in the additional sugar. You can also mix 1/4 teaspoon ginger into the sugar to roll the balls in. Squish balls with the bottom of a cup. Bake at 350 for 8-9 minutes or until edges are slightly browned.
You can also sprinkle some extra grated lime peel on the top if you want too.