Well, if you have to pick the most similar foods to Portuguese food...

first would be
Brazilian
then
Spain, Italy and France.

Portuguese food is excellent, not because i am Portuguese ok? I can easy say that for many things we are the worst in the world, but not for food.

Probably the best in the world. But you have to get a litle away from the major cities, go to the interior.... and them....OMG...

Seafood of course it must be in seaside. One of the best lobsters in the world is from
Sagres village in top south of Portugal in Algarve, in the most left part, the most far away point from UK... it's just superb !!!

One of the major reasons that we have great food is basic ingrediants like olive oil.
We avoid to cook with vegetal oils or butters or that kind of sh.. we have the best olive oil in europe, and that is the basic ingrediant.
Wines are also excelent, like Spain/France/Italy it's really good.

But Harrison, it's much better then Spain...