Who tells Menelaus how to break the curse so he can return home?

In Homer's "Odyssey," the character who instructs Menelaus on how to break the curse and return home is Proteus, the shape-shifting sea god. Menelaus encounters Proteus while stranded in Egypt and learns that he must find and confront him to gain information about his homeward journey. Proteus reveals that Menelaus must sacrifice to the gods and also provides guidance on navigating the challenges he faces. This encounter ultimately helps Menelaus return to Sparta.