The cookie dough can be frozen for up to 1 month. The baked cookies can be stored in an airtight container at room temperature for up to 1 week.
You can use either candied peel or candied zest for garnish, but it should be moist so it doesn't dry out while baking. To make your own candied orange zest: Blanch large strips of the zest of 1 orange and then slowly cook them in a mixture of 3/4 cup of sugar and 1/2 cup of water for an hour. You can also used crystallized ginger.
When chopping candied citrus peel or candied ginger, lightly spray or rub the blade of the knife with neutral vegetable oil to prevent sticking.