I've resisted writing this email for at least 2 years but I can't take it anymore. I'll go mad if I don't at least try to enlighten the great folks who frequent the Chowhound boards. :)
Generally speaking, if an Italian word ends in an "i", it's plural. So, you can't say "I had a panini". That translates to "I had a sandwiches". The same goes for biscotto....one cookie...vs biscotti, which is cookies. Most of the time, a word ending in "e" is also plural. (There are some exceptions to that rule, but not many.)
If only everyone would read this and learn, I could die a happy Italian.