Blueberries & lime - a combination made in heaven, makes for beautiful pairing. The buttermilk in the pound cake gives it a beautiful, light crumb. It's very nice warm, and good even the next day. The blueberries rehydrate with the lime and buttermilk and add glory to the cake. This is one basic cake I make ALL the time, the recipe lives in my head, and takes any number of flavour combinations willingly.