Sutra puts itself in the "gourmet vegetarian/vegan" category occupied by places such as Millennium, Horizons, Candle 79, Dragonfly Neo and Sublime. I think it definitely matches the ambience and sophistication of those places, but adds two intriguing elements: limited set-seatings; and ever-changing menus.
The restaurant is technically vegetarian, but I think tends to serve mostly vegan food. Make sure to ask questions when you make your reservation. I made reservations for the 9 p.m. seating on a Saturday. As it turned out, my friend and I were the only ones at the restaurant that night, so we received special treatment. Normally though, everyone eats each course simultaneously. Each new course is introduced with a gong and an explanation of the dish.
Our prix-fixe meal ($33 per person for four courses) started with sesame-toasted sunchokes with hazelnut sauce. This was probably the highlight of the meal for me as I loved the savory sauce and the crispy sunchokes (they look kind of like fish fillets); also, there was an array of textures and flavors. The next course, a mixed and foraged greens salad with avocado was okay, but the flavors didn't seem great to me. By this point in the meal I was already starting to feel full, especially with the beer I ordered, so make sure to pace yourself and avoid alcohol, potentially. The third and main course, a hearty lasagna with foraged mushrooms and pecan "cheese" that looked and tasted like ricotta, was wonderful. It was filling, delicious and probably one of the best vegan lasagnas I've ever had. Finally, for dessert, we were served a chocolate truffle with lemongrass and crystallized ginger. The chocolate came from a nearby Seattle company, Theo, which is the only organic, fair-trade chocolate maker in the US. I thought it was wonderfully dense and rich, and tasted even better thanks to the unusual lemongrass and ginger flavors.
Overall, Sutra is a great restaurant and offers an unusual experience. This is the perfect place to take a date or for special occasions. Personally, I think Sutra would do well to eliminate the second course and maybe drop the price of the meal to $25 or so, but this is otherwise a nice place and stands apart from other upscale vegetarian restaurants in the US.