Steam the peeled potatoes cut into sticks in a little water with salt until they are almost cooked.
Fry the finely diced onion and 1 tablespoon of parsley in the heated fat and add the potatoes. Put everything in an ovenproof bowl and pour the milk, whisked with the eggs and seasoned with salt or paprika, over it. Just leave it on a small fire until the eggs are set. Serve sprinkled with the parsley.
Instead of onions, the dish can also be seasoned with nutmeg and served with a strong sauce.