If you ask me, this is one of the all-time great VFYTs. The reader writes:

Greetings from Puebla, Mexico, Rod, where we’re celebrating the 202nd anniversary of Independence. ¡Viva México!

Mexicans get together to celebrate the night before Independence Day
here, remembering Miguel Hidalgo’s “grito” (cry) starting an uprising for independence from Spain on September 16th, 1810. At 11 PM (or somewhere approximately in that neighborhood!) authorities from the President to governors to neighborhood leaders lead the crowd in cries of ¡Viva! for the heroes of Mexican Independence and then ring a bell and wave the flag. It’s an extremely cool tradition, especially when accompanied by fireworks in close proximity to everyone!

Anyway, tonight we had a giant 200 person potluck with more amazing
dishes than I could possibly photograph (much less eat, sadly). This
is a “chancla,” sandal, a sandwich of shredded meat on a soft white
roll, bathed in red salsa. Notice the colors of the Mexican flag:
green (avocado), white (onion), and red (salsa). No one combines
flavors and spices like Mexicans, with all due respect to your beloved French!