I consider this dish as a simple variation on the theme of meat pies, since it's inspired remotely by my adolescent gastronomical memories from Australia.
As you see, contrary to what I said recently in a comment to my reader Annie, jokingly, I do in fact keep stocks of canned peas… which are just right for this quick-good-food preparation.
The recipe is elementary. Throw a few bits of white chicken flesh into a small quantity of boiling water. After a few minutes, hang on to the greasy liquid while using a knife and fork to transform the cooked meat into shreds. Make an ordinary white sauce with melted butter, flour and cream. Take it momentarily off the heat source. Use the above-mentioned liquid to enlarge the volume of sauce, while placing the mixture back onto a lowered heat source and stirring continuously. Add the shredded chicken, followed by salt, pepper and Provençal herbs. Use this mixture to fill a traditional puff-pastry pie (with chimney). The surface, painted with egg and milk, was sprinkled with sesame seeds.
If ever you felt like serving up this dish with leeks or peas (maybe in an ambiance of authentic Breton music from Princess Nolwenn), make an effort to get the spelling right. Avoid the presence of pie-loving dogs.