Soy and Sake has a few interesting dishes but is mixed overall in terms of food quality and service.
We started with a roti canai appetizer, which was good and did a wonderful job veganizing a traditional Indo-Malaysian dish. The roti was soft and flaky and the curry stew was savory, though it could have been thicker, and the soy chicken could have been slightly firmer. On a whole, though, it came together.
The avocado salad was bland and forgettable, though. It was basically lettuce with thinly-sliced avocado and cafeteria-grade tomatoes that looked pale and pink.
For main courses, we split a veggie burger, a "Thai grilled chicken" and a "Thai Mango Chilean soy fish." The burger had a great, juicy soy pattie, but the rest of the dish was low-quality, with Heinz ketchup, a white flour bun, and limp lettuce and tomatoes. The Thai grilled chicken came to us sizzling on a hot plate and was subsequently covered in a peanut sauce. I liked the texture of the chicken pieces, but the sauce was bland and the vegetables with the dish were not well-integrated (they seemed like an afterthought).
Lastly, the Thai Mango Chilean soy fish was excellent. This dish pleased everyone, including the two non-vegetarians in the group. It consisted of large pieces of batter-fried soy fish, served with brown rice, strips of raw, green mango, and a delightful citrus sauce. The dish came together well, was filling, and represented a great value in terms of portion size. It's also an unusual offering and stands out from the rest of the menu, which is fairly standard and unremarkable.
The service was below average, which was surprising given that the joint is sort of classy (though not "upscale" by any means). Our waitress was inattentive, borderline curt, and made basic mistakes, like not giving us serving spoons with each dish.
The prices are moderate and this is a good place to take a date. While there's a wall of glass along one side of the restaurant (which makes for great people-watching), it's also quite drafty in the winter, so I'd recommend taking a table away from the windows.