The Squirrel Hill Dunkin Donuts at Shady and Forbes: Any reviews about the breakfast meats being bad are way off the mark. This is a vegan (and Kosher) DD!! They use Morningstar brand meat alternatives which are delicious. I'm not a vegan or a vegetarian.
My go-to is two egg whites and white cheddar on a sesame seed bagel. You can't get a breakfast sandwich cheaper unless you make it at home.
Service is always pretty quick. They have a nice fireplace and there are lots of tables and booths.