Coarsely grind the oatmeal and almonds.
In a bowl, mix oatmeal, almonds, banana, salt, and cinnamon.
Shape the dough into rounds and place them on a baking tray lined with parchment paper.
Bake in a preheated oven at 180°C (356°F) for 15 minutes.
Let the cookies cool, then transfer them to a plate.