The indian place up at Maridalsveien is quite good. Main dishes are 160-170 NOK. 20-25 minutes prep time on takeaway. +47 22201248. http://rdtandoori.com/st.html
Asian place in Møllergata is fast and cheap. Main dishes 110-130NOK.
Funky Fresh Foods @ DogA, Hausmannsgate 16. One of the best places for vegan food in Oslo. http://www.funkyfreshfoods.no/
Gourmet thai corner of Rosteds gate & Fredensborgveien. Great thai curry. Dishes around 100NOK. http://gourmetthai.no/
Nam Fah, on Nordre gate. Good Thai place. Around 110NOK. http://www.nam-fah.com/
Sushi on corner of Rosted gate and Deichmans gate. Prices vary but not the most expensive sushi in the city.
* Pizza place across the street next to Kiwi. Pizzas, kebabs and falafels. They bake their own bread and pizza dough. 90-150NOK
Freddy Fuego has nice burritos. They serve meat, veggie and vegan styles. 90-150NOK depending on choices.