Meanwhile, in a salad bowl, crush the Roquefort cheese with a fork.
Add an egg and mix, then add the flour and keep crushing with the fork in order to obtain the smoothest mixture that you can. Add the last 3 eggs, one by one, while beating like an omelette.
Add a little salt (Careful! Roquefort cheese can be very salty) and generous pepper.
Pour the milk slowly in the mixture while mixing.
Pour the preparation in a non-stick pan and bake in oven for 35 minutes.
Serve warm or at room temperature on a bed of lettuce.