Is it possible to have a half portion?
por-ZIO-ne — three syllables, stress on the second.
When you want to taste a dish but the full portion is too large, or when you want to try multiple dishes without overeating.
'Mezza porzione' (half portion) is a legitimate request in Italian restaurants, especially for pasta. Not all restaurants offer it, but many family-run places will accommodate the request, especially for children or elderly guests.
Ha una porzione piccola?
Do you have a small portion?
Slightly different framing — useful for children's meals
Ne prendo un assaggio.
I'll just have a taste.
'Assaggio' = a taste — suggests a very small amount, used informally
Dividiamo un primo?
Shall we share a first course?
Suggesting to share — perfectly acceptable in Italian casual dining
Sharing dishes or asking for half portions is more common in northern Italy and in tourist-oriented restaurants. In traditional southern Italian trattorias, portions are usually generous and sharing is done informally — just ask for an extra plate.