I have been to Lentil as Anything's Preston restaurant, and I was quite impressed.
On top of their social engagement, their awesome alternative and cooperative flair, the fact that nearly every dish available can be made vegan and their pay-as-you-like concept, the food was actually delicious, beautifully presented and filling. Full score in my book.
I went there with a less-alternative-oriented, non-vegan colleague, and she also was favourably impressed. If I was not just visiting, but living in Melbourne, I would definitely visit this place or one of their other restaurants very often.
We had the burger with fried potatoes (wonderful, and actually quite healthy), the roasted vegetable salad and one of their Indian-inspired starters, and everything was delicious. Highly advised.