Crack the egg into the first of 3 identical 'things', jars, ramekins, use whatever you have lying around, although something transparent does make it easier, beat gently.
Then add the flour into the second bowl, ensuring that it comes to the same level as the egg.
Repeat with the milk.
Now, combine all the ingredients with a whisk and set aside to rest. You should rest for at least 4 hours, but the longer the better, go overnight if you want.
Take two 8cm (3 ¼") dariole moulds and put a teaspoon of lard or beef dripping in the base of each and place in the oven, set the oven to 230°C and bring to temperature.
When the oven is hot and the fat is smoking, pour half of the batter into each mould and close the door.Cook for 25-30 minutes and serve immediately!
Notes
This recipe is all about volume, so there is no weighing required!