White Chocolate And Sour Cherry Scones

Name: White Chocolate And Sour Cherry Scones
Ingredients: 1 large egg; a scant 1/2 cup (115 ml) cream, whole, or low-fat milk; 1 1/3 cup (170 g) flour; 1/3 cup (45 g) buckwheat flour; 1/3 cup (45 g) cornmeal, preferably stone-ground; 1/3 cup (65 g) sugar; 2 1/2 teaspoons baking powder; 1/2 teaspoon salt; 6 tablespoons (85 g) unsalted butter, chilled, cut into cubes; 1 cup (140 g) white chocolate chunks; 1/2 (60 g) coarsely-chopped dried sour cherries; 1 egg yolk mixed with 1 teaspoon milk; coarse (or granulated) sugar for dredging the scones