Question: how long to cook premade chicken kiev?
Answer: Pre-heat oven to 180°C (conventional).
Place kiev onto grease proof paper on an oven-proof tray. ... 
Once oven is heated place kiev in oven and bake for 30 minutes.
TIP: If using a thermometer, cook to a core temperature of 75°C.
Once cooked, allow to stand for a few minutes before serving.