What vegetables are common in Italy?

your question is rather vague... i have two answers, so let me break it down for you:

1. If you're asking what vegatables are commonly grown, vineyards are common, and grain fields are here and there. Italians tend to stick with berries.
2. If you're asking what foods are commonly eaten/drank, wine from grapes is common, and roasted peppers are often eaten.