Step 1: Preheat the oven to 400°F (200°C) and prepare a baking sheet lined with parchment paper.

Step 2: In a large bowl, mix together all-purpose flour, salt, baking powder, baking soda, and granulated sugar.

Step 3: Incorporate very cold, diced unsalted butter into the dry mixture until it resembles coarse meal.

Step 4: In a smaller bowl, whisk together the egg, whole milk, and heavy cream until well combined. Pour into dry mixture.

Step 5: Carefully fold in quartered fresh strawberries into the dough.

Step 6: Transfer the dough onto a lightly floured surface and pat into an 8-inch circle, about 1-inch thick.

Step 7: Cut the circle into 8 equal wedges and transfer to the baking sheet.

Step 8: Create an egg wash by whisking together the beaten egg and water. Brush over the tops of the scones.

Step 9: Bake for about 18 minutes until golden brown.

Step 10: Cool on the baking sheet for 10 minutes, then drizzle with the glaze.