Portland in August
Breakfest- Sunday Brunch,Dinner and Bars Rec's
WE are staying in the NW near 21st but will travel
Love seafood and comfort food Not into tapas and Mexican
The Pearl Bakery ( eat there or take it with you)
Mothers ( great breakfast! ) also great comfort food dinners
The Heathman ( very nice )
Fullers ( funky )
Red Star Tavern ( in the 5th Avenue Suites Hotel) great breakfast & brunch
Near where you are staying...( Portland Streetcar will get you all over town )
On NW 21st, Serratto ( Good Italian)
Cafe Mingo ( really good Italian, always lines )
In the Pearl
Henrys Tavern - (good food, big space, large servings ..comfort food)
Everett Street Bistro ( just plain good food -breakfast/lunch/dinner)
Southpark ( seafood-excellent)
Carafe ( French bistro)
IMO the best brunch in town is at Simpatica, Sundays only, starting at 9, SE 9th and Pine (across the river).
Mother's is usually a good breakfast too, and if you go, the extra $$ for the french press coffee is worth it. Their lunch and dinner menu is heavy on comfort food. They take reservations...which are a good idea if you want to go there.
On NW 21st my favorite is Basta's. Great happy hour deal starting at 5, best $20 steak in town, yummy carpaccio, fabulous mussels in a saffron/wine/cream sauce, fabulous crispy 1/2 chicken, very good caesar salad, always good service/prices/value.
If you love seafood and like it raw (as in sushi) Murata (downtown at 200 Market) has some of the best in town. Carafe, the French bistro recommended above (which is also very good) is in the same building.
Across the river on SE Hawthorne near 20th is Ken's Place. Lots of comfort food to be found there.
If you are looking for a funky upscale dance clubby bar experience, aura, across from Powell's might be fun. Great ladies room!
If you want to taste local beers and are looking for a pubby bar atmosphere try Rogue in the Pearl, or go to the New Old Lompoc which is near where you are staying (great home brewed root beer too!).
I would pop into either Paley's or Wildwood just for the mussels at either place. Both on NW 21st.
The recommendations of Seratto and Mingo are good but they may not fit your definition of 'not expensive'
Justapasta might be a better fit.
Also on 21st is Ken's Artisan Bakery.
I think Ken's croissants/pastries are better than PearlBakery (where I prefer their breads).
Also for french pastries near NW21st :
Haven't been there myself but a French person highly recommended it to me once.
If you're willing to travel, I would recommend Pambiche on the east-side for Cuban - which to me is inherently comfort-food-ish.
Yes, Boulangerie St Honore is nice, especially if you sit outside. I go in for one roll or loaf of bread and somehow always leave with a bag of tarts and pain au chocolate!