Fussily obsessive about flatulence, sent back Italian food (7)

I believe the answer is:
lasagna
'italian food' is the definition.
(I've seen this before)
'fussily obsessive about flatulence sent back' is the wordplay.
'fussily obsessive' becomes 'anal' (anal can mean obsessed with order. I am not sure about the 'fussily' bit.).
'about' means one lot of letters goes inside another.
'flatulence' becomes 'gas' (flatulence is gas from the body).
'sent back' says the letters should be written backwards.
'anal' going around 'gas' is 'angasal'.
'angasal' written backwards gives 'LASAGNA'.
Can you help me to learn more?
(Other definitions for lasagna that I've seen before include "Italian food" , "Italian dish" , "Baked pasta dish" , "Calorie-rich food" , "pasta's provided" .)
