Heat 4 liters of water in a large saucepan.When it boils, salt it then immerse the pasta in it and cook it according to the instructions.
Meanwhile, finely slice the shallots and fry them in a large pan with a little olive oil until translucent.Add the ground beef and brown, stirring occasionally, for about 5 minutes.Add the Boursin and let it melt in the pan.Mix well.
Drain the pasta then pour it over the creamy beef and Boursin sauce.