Q. You mentioned in the name of the Chasam Sofer that the mon began to fall on Lag Baomer. What is the connection if any?
A. Sifsei Tzadik (Lag Baomer 5), questions how Rasb’i and his son were able to comply with all the mitzvos such as kiddush, chalos, matza, maror etc. during all the years they spent eating the choruv tree fruits inside the cave. He explains that the fruits possessed the qualities of the mon that rained on the Bnei Yisroel while they were in the desert. (See Shaar Reuben p. 545 quoting similar from Zohar), and they complied with mitzvos in a similar way.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a