I work downtown and am gluten-free. It seems like more and more restaurants are starting to understand the issue and are able to adapt to my dietary needs. A few that are particularly good: Andaluca (excellent Mediterranean) at 5th & Olive has a great gluten-free menu available on request. Wild Ginger also does many gluten-free dishes upon request. I am not a fan of chain restaurants, but PF Changs has a gluten free menu, and I find gluten free Chinese food (even Americanized versions) to be rare. Bambuza Vietnamese at 8th & Pike has gluten free indicators on their menu and good food, if spotty service. For casual lunches, I eat regularly at Juice it Cafe on the ground floor of the Convention Center (7th & Pike)--healthy brown rice bowls, very gluten savvy. I also order special gluten free meals at Harbor Cafe at 4th & Union. The IGA grocery store on 3rd Avenue carries gluten free cookies and bread from Haley's Corner Bakery in Kent. Tully's coffee locations (but not Starbucks or Ladro) carry gluten-free pastries from WOW baking. In Madison Park, Cafe Flora is both vegetarian and very gluten-free friendly. And the pasta place in pike place market has one gluten free option but I haven't tried it yet. Oh and the Cinnamon Roller place in the market has wheat free and gf pastries.
I don't know about gf sourdough. My favorite gluten free bread is from Great Harvest Bakery in West Seattle--the gluten free buckwheat Dakota. It's heavy and dense but it tastes really good. Flying Apron bakery in Fremont is all gluten free, but it's also vegan and frankly while I appreciate what they are trying to do, I find most of their stuff is just not that tasty. Da Vinci gf bakery in Greenwood may do a sourdough but I am not sure.
407 Olive Way, Seattle, WA 98101
Wild Ginger Asian Restaurant
1401 3rd Ave, Seattle, WA 98101
Bambuza Vietnamese Bistro
820 Pike St, Seattle, WA 98101
Haley's Corner Bakery
10216 SE 256th St, Kent, WA
I just looked up Impromptu and called them. They're mostly gluten-free, but not entirely. They have baguettes and pasta, both made of wheat flour, but can provide alternatives.
And here I was hoping to pick up some gluten-free pasta making tips from them. :)
While we're on the topic, does anyone know of gluten-free or very low gluten sourdough bread available locally?
Do you mean a restaurant that is all GF, or do you want a place that is very good about GF dining within a certain cuisine/atmosphere/etc?
I don't know of any all GF places except for Impromptu, but I eat out all the time and I have a gluten allergy, so if you're looking for a specific kind of place where you can feel comfortable eating safely say what that is and I can try to make a rec!