Answer:
You'll see savory dishes in Hong Kong sizzling in these.
Long and think, red within, with a nail at the end.
I am the red tongue of the earth, that buries cities.
I know a word of letters three. Add two, and fewer there will be!
Slayer of regrets, old and new, sought by many, found by few.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.