I have been to Toulouse three times this year and went to Saveurs Bio at least once during each stay. They have a great mostly vegetarian buffet with a lot of vegan options too. In addition you have a lot of choices to order from the menue which made my non-vegetarian collegue happy. In fact he liked the food there so much that for our next business trip there was no convincing necessary to eat at Saveurs Bio again. This time he also tried the buffet and was quite happy with it. The (hearty) salad variety is quite large and is accompanied by four warm options. The culinary interested will find something new each time (last time I was surprised by the "ancient tomato salad"). There are also soups and a desert buffet. The price for food and drinks is very reasonable.
Cons: Service a bit slow, bring time