Step by step

Smear some clam sauce on the bottom of a rectangular roasting pan

Tips
Should you wish to make your parsley lasagna with clam sauce even more delicious, you could add some top quality mussels.
Trivia
Despite lasagna being considered a specialty of the Emilia region of Italy, especially those versions made with a meat filling, in fact this classic of Italian cuisine has been around for a very long time, even in Ancient Rome.