There once was a fantastic restaurant in Willow Grove that served some of the best vegan cuisine that ever hit the suburbs.
They moved to Philadelphia a couple of years ago and still serve amazing food, but it's just a little less convenient for those of us who live in the burbs.
Horizons Philadelphia is a more upscale experience than the Horizon's Cafe of yesteryear, but the owners and chefs maintain the same quality of their menu and dining experience on South 7th street in Philly. 

I recommend the seitan dishes, but the desserts have always been worth saving room for.