Sight pté being prepared for this dish (9)
I believe the answer is:
spaghetti
'for this dish' is the definition.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for spaghetti that I've seen before include "Strings of pastas" , "2 [PASTA]" , "Stranded fare" , "Italian food" , "Pasta in the form of long strings" .)