Tapas at Delicatessen ...
... salmon paella with some wicked carrots (paella wasn't that great, but the salmon was killer), patatas bravas, bread with aioli, manchego, great green beans, tortilla with chorizo, and lamb chops with potatoes. Overall, pretty excellent food, and somewhat affordable drinks by Oslo standards. It's the advantage of dining in Grunerlokka - more affordable than central Oslo.