I lived 18 years in Italy so I too know the Mediterranean diet. After that, there was no danger I would go to a fast food place! And there is no salad dressing but real olive oil and balsamic vinegar! For health reasons I use oilve oil to replace butter, in fact it is good on corn on the cob.
I was shocked by how overweight people were in the US when I came back.
Unfortunately, here in Minnesota we don't have the type fish I could eat there. And someone who knows how to cook fish! On the East Coast it is easier to enjoy fresh fish.
I too noted the ridiculous portion sizes here...I think it is a marketing strategy. I suggested to one restaurant that they provide smaller portions with higher quality food for the same price....