My favorite Sacramento vegan breakfast is found at the Fox and Goose, a British-style pub that's been on R Street since before R Street became popular. When I think of British food, the first word that comes to mind is definitely NOT "vegan," but they make a great tofu scramble (it's called "Creative Tofu" on their menu). For an extra charge, you can have them add whatever items you'd like to the tofu, such as avocado, broccoli, mushrooms, black olives, spinach, tomatoes, pepperoncini, and other types of vegetables, or even marinated tempeh strips. The Creative Tofu comes with either fresh fruit or English country potatoes (you'd probably better double check to make sure that they don't use butter to fry the potatoes). It also comes with your choice of breads, few of which are vegan. I usually just have them bring me some dry sourdough toast, and then I smear it with their fabulous raspberry jam.
I hardly ever eat anything at Fox and Goose except breakfast, but I notice on their lunch menu that they serve a couple of different vegan burgers -- a vegetarian burger made of tofu and rice, and a nutburger made of a variety of nuts, carrots, and spices. They also serve a hummus vegetarian sandwich.
Fox and Goose is located at 1001 R Street. Their phone number is 916-443-8825, and their website address is http://www.foxandgoose.com/. According to their website, they serve breakfast Monday through Saturday from 7:00 a.m. to 2:00 p.m. and on Sunday from 7:00 a.m. to 3:00 p.m. Lunch is served Monday through Friday from 11:00 a.m. to 2:00 p.m.