From the Americas: peppers, tomatoes, corn (maize), wild rice (still grows wild), cocoa, potatoes, avocados, cranberries, blueberries (I think) some beans and squash
Most grains are from Asia and the middle east
I think cabbage, brussels sprouts, broccoli, cauliflower etc are virtually the same plant, just selectively bred for certain characteristics.
Most fruits are from Asia and the middle east: pears, apples, cherries, citrus (I believe there is still naturally occuring wild citrus), almonds, grapes, apricots, peaches...
Here's a website I found:
http://www.localhistories.org/fruit.html
But I think that there was a green giant involved in there somewhere, Veggies made him happy, like gritsar in the 70s.........