Originally Posted by
nerd
What missydarlin said - it was probably chiles/lime/salt, Tajin being a commercial equivalent.
The U.S. version of "chili powder" is not what you're looking for - you just need some sort of crushed, dried hot peppers.
^ yes, you definitely want
chile powder (as in powdered dried chiles)
and not
chili powder which is a mix of spices.
check the hispanic aisle of the grocery store for inexpensive packets of dried chiles in whole, flake, and powdered form.