Dear Zambia,
I wish to highly recommend Queen's Calabash for those of you that want to eat real food in Lusaka, not those chicken and chips nonsense snacks. They serve hefty portions of quite a variety of foods from iciloli (braiied fish), pork chops, T-bone, mbuzi, knuku yaku munzi, etc. Good range of vegetables (cimpapila, lumanda, cibwabwa, umulembwe, etc.).
Be careful to avoid eating too much nshima as the relish is quite sizable and you won't be able to finish all the food. Pricing is 26 pin. They are in Enock Kavu Road in Rhodes park off Addis Ababa. I used to go to their other equally excellent branch in Thornpark near the railway line (not sure if they are still there).
The only other place I have been to that is comparable is NASDEC at the sports clubs at the back of Arcades but QC still wins. The best part about them for me is that they have maintained their standards in the last 3 years I have been going there.
Bon appétit.