Wash the pumpkin thoroughly and cut it into small cubes with the skin on.
In a bowl, mix oatmeal, almond flour, olive oil, cinnamon powder, and salt to make the crumble dough.
Spread the pumpkin in an oven-safe dish or pan and top with the crumble mixture.
Bake in a 180°C oven for 20–25 minutes until golden brown.
Plate and serve.