Finely grate the carrots and set aside.
Finely grind the oatmeal.
In a bowl, mix the oatmeal, grated carrots, egg, Greek yogurt, baking powder, cinnamon powder, and salt.
Pour the batter into a pan lined with parchment paper.
Bake in a preheated oven at 180°C for 25 minutes.
Once completely cooled, top with nuts or Greek yogurt as desired.