His tongue firmly planted in cheek, Johannesson replied that he was so adamantly against pineapple pizzas that he just might enact a law banning the combination, the Icelandic tabloid Visir reported.
On Tuesday, Johannesson clarified his stance on pineapples and the law on Facebook.
"I like pineapples, just not on pizza. I do not have the power to make laws which forbid people to put pineapples on their pizza," he wrote in English.
"I am glad that I do not hold such power. Presidents should not have unlimited power. I would not want to hold this position if I could pass laws forbidding that which I don`t like," he continued.
"For pizzas, I recommend seafood."
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