Preheat the oven to 200°C
Clean the pumpkin, then cut it into large chunks and cook in the oven until you can pierce it easily with a fork.
Let the pumpkin cool down at room temperature then peel it and purée it by hand with a fork or masher (don't use a blender).
If you want, add a pinch of nutmeg.
Add black pepper.
Gradually start adding the flour. You have to obtain a thick batter. Don't add too much flour otherwise you'll get a gluey consistency.
Bring a pot of water to a boil.