Preheat the oven to 350ºF. Line a baking sheet with parchment paper.
In a large bowl, whisk together the almond flour, baking powder, cinnamon, and salt. In a separate bowl, whisk together the egg, applesauce, honey, and lemon zest. Pour the wet ingredients over the dry and stir to form a thick dough. Gently stir in the blueberries.
Form the dough into a ball and place on the baking sheet. Shape into a disk about 1-1½ inches thick. Cut into 8 wedges using a sharp knife. Gently separate the wedges out onto the baking sheet. If using, sprinkle the scones with coarse sugar.
Bake for 25-30 minutes, until golden brown. Cool completely before serving or storing.