Question: how do you cook pre cooked lobster tails?
Answer: Preheat your oven to 350 degrees Fahrenheit.
Put the lobster in a heat-proof/oven-safe dish and cover it with foil. Make sure there is liquid in the dish (the lobsters sauce, stock or butter).
Heat in the oven until the lobster is warm. ... 
Take out of the oven and serve.