Solid ol' Saiva Kade in Jtown.
The Yarl Eat House is perhaps Sri Lanka's best street-diner, serving spicy crab, prawns, mutton and cuttlefish along with a solid rice and curry, all for a reasonable price.
Taste of Asia is a very affordable favourite on Galle Road for hoppers and Jaffna food.
Havi at Pannipitiya is a good spot to chill with some booze, and delicious black pepper pork.
They do chicken biryani pretty darn good and now have crab and lamb on the menu.
Yaal has stood steady in the same, stoic building down Marine Drive. They've managed to thoroughly maintain their quality of food and service over the years.
The Dehiwala branch of OG Banana Leaf.
Anilana is one of Pasikuda's big beachside hotels. They've got killer ambience late in the evening, and they do a very good Jaffna crab curry.
One of the better eateries in Jaffna, with a wide variety of Northern Sri Lankan food