Where can I find the most authentic Jaffna Crab Curry?

For the most authentic experience, try the Nallur Bhavan or the restaurant at Jetwing Jaffna for a slightly more upscale version. The secret to a real Jaffna crab curry is the use of murunga leaves and the specific roasted curry powder blend unique to the northern province. It is traditionally quite spicy, so you may want to ask for a milder version if you are not used to high heat levels.