Its a shame they didn't show how everyone was afraid of the potatoes and then eventually she convinces them it is safe to eat like in the novel.
Though I do disagree with previous comments on why they haven't discovered some cooking methods. Technology like cooking methods don't automatically come with time, for some it is a waste of resource if you fail or even succeed at experimenting, other times, you die.
Examples will be potatoes that when green are poisonous because they are technically part of a poisonous plant in the nightshade family,
or the puffer fish preparations to cut away the poisonous parts or sometimes even pickling poisonous parts for 3 years in a special method to remove poison,
or in America, the young pokeweed leaves and shoots that has to be boiled and rinsed at least 3 times to remove the poison.
Also.... what is wrong with you people! Pineapple pizza is a sin to the purity of pizza! Down with the heretics!