Preheat oven to 200 °C. Line the baking tray with baking paper.
Mix eggs, buttermilk and lemon peel in a measuring cup. Mix flour, sugar, baking powder, baking soda and salt in a mixing bowl. Work the butter into the flour mixture with your fingertips until the whole thing looks like coarse crumbs.
Proceed as quickly as possible: Only cold butter makes light and flaky scones. Then add the liquid mixture and stir gently until everything is just about mixed. Do not stir excessively!.
Carefully mix in the blueberries.
Pour the whole mixture onto the floured work surface and form a disc of dough about 2 cm thick and 20 cm in diameter. The dough may be moist and difficult to work. If necessary, dust the work surface with a little more flour and work quickly and carefully to remove the blueberries
Quarter the dough. Halve each quarter again, so that you have 8 pieces of dough. You can also beat the dough by hand to a thickness of 2 cm and cut out 8 dough circles with a glass. Sprinkle each scone with cinnamon and sugar.
Bake for about 18-22 minutes until the scones have taken on some colour. Let the scones cool on a cake rack for 10 minutes before you enjoy them
Recipe: Cynthia Barcomi, from "Baking. I love Baking", Mosaik Verlag