Rajun Cajun is decent for a quick, cheap meal. All the dishes are sitting there in a buffet counter and you tell them what you want (individual dishes, combo platters, etc.) and they slop it onto a plate for you. This isn't an ecological place by any means; everything is served on styrofoam plates and you use plastic utensils.
Make sure to ask questions about ingredients, as none of the staff seemed to be familiar with the word "vegan," though they understood the concept of no dairy and no eggs. Maybe the staff has changed since previous reviews? In general, as long as the dish doesn't have paneer, it's probably good to go in Rajun Cajun (they don't seem to use cream, yogurt or butter/ghee in their curries).
I had a vegetarian combo platter (two curries, rice, one samosa and one roti) for $8.99. Neither of my dishes stood out in any way and tasted like oily, all-purpose Americanized North Indian food. The chana (chickpea) was bland, in my opinion, and the gobi-mattar (cauliflower and peas) was watery. How come they don't have any dishes with tofu or seitan or some other cool vegan ingredients, such as the ones you find at Soul Veg or Yah's Cuisine?
The samosa was soft, rather than crispy, though the roti was well-made and felt authentic, like straight out of a kitchen in India.
The interior of the cafe is a bit bleak: plastic booths; weird neon light that somehow managed to be dark and moody rather than bright and vivacious; and loud Bollywood music.
This is eminently avoidable Indian food. The only plus points are that it's cheap and that it's one of only a few decent vegan-friendly options in Hyde Park.