Ingredients

1. 2 eggs
   1 teaspoon water
   2/3 cup buttermilk
   2 cups flour
   3 tablespoons sugar
   1 tablespoons baking powder
   1/4 teaspoon salt
   zest of two large lemons
   1/2 pint fresh blueberries
   5 tablespoons cold butter, cut into small cubes