Clean leeks thoroughly before cooking. Grit hides between the layers. Slice first then soak in a bowl of cold water, swish, and drain.
Toasting the orzo dry in the butter and leek base before adding liquid adds a nutty depth that makes the finished dish taste more complex.
The Boursin melts beautifully into the sauce. Break it into pieces before adding so it incorporates faster.
The lemon is not optional. The brightness it adds at the end is what makes the dish taste alive rather than just rich and creamy.