Preheat the oven to 425F and line a baking sheet with parchment paper.
In a large bowl, combine all-purpose flour, baking powder, cinnamon, and salt.
In a medium bowl, whisk together egg, maple syrup, mashed bananas, cottage cheese, and vanilla extract.
Pour the wet ingredients into the dry ones. Mix with a silicone spatula until well combined. It might be on the drier side, that’s ok.
Now, grate the cold butter into the dough and fold it to disperse it throughout the dough.
Finally, roll the dough into a ball and place it on a floured countertop. Roll the dough until it’s 8-9 inches wide and cut it into 8 triangles. Feel free to flour the rolling pin if the dough is too sticky, and it should be!
Place the scones on the baking sheet, space them out, and if they don’t fit, use two baking sheets.
Top up each scone with 1-2 slices of banana.
Whisk together 1 egg with water, and then, using a brush, cover the scones with the mixture.
Bake in the oven for 18-20 minutes.
Once done, mix together Greek yogurt with maple syrup to form the glazing and cover the scones with it.