I am definitely not the right person to explain about Mimouna. Wikipedia has a much better explanation than I could give, starting with:
Mimouna … is a traditional Maghrebi Jewish celebration dinner, that currently takes place in Morocco, Israel, France, Canada, and other places around the world where Jews of Maghrebi heritage live. It is held the day after Passover, marking the return to eating hametz (leavened bread, etc.), which is forbidden throughout the week of Passover.
https://en.wikipedia.org/wiki/Mimouna
Unfortunately, the celebration in Jerusalem’s Sacher Park was rather a washout, this year, as thunderstorms lasted for most of the day. However, we were invited to the dry quarters of our next-door neighbours, who served muflettas and all sorts of sweet things, and also dressed up for the occasion.
Miriam Drori, Author 