Blueberry Scones with Lemon Glaze

INGREDIENTS

• 1/2 cup freshly squeezed lemon juice
• 1/2 teaspoon salt
• 2 tablespoons sugar
• 1 tablespoon baking powder
• 1 tablespoon unsalted butter
• 1 lemon, zest finely grated
• 2 cups all-purpose flour
• 1 cup heavy cream, plus more for brushing the scones
• 5 tablespoons unsalted butter, cold, cut in chunks
• 1 cup fresh blueberries
• 2 cups confectioners' sugar, sifted