I was in Portland last month, and on Extramsg's advice went to Ken's Bistro for lunch. Excellent, friendly place, with cookies fresh out of the oven at the end of the meal.
I also enjoyed a minor pig-out at Pix Patisserie, which is a great place to stop if you're into truffles and French pastries.
Lastly, I got a huge takeout container of chana masala and a mango lassi from one of the food trucks downtown. Can't remember the name, but it was vegetarian Indian. It was pretty good, especially for the price - but mainly I just enjoyed the novelty of the food truck.
Have fun!