Can I dehydrate pineapple in the oven?
Preheat oven to 225 degrees. Line two baking sheets with Silpats (French nonstick baking mats) or parchment paper.    Peel pineapples. Using a small melon baller, remove and discard "eyes." Slice pineapple very thinly; place slices on baking sheets. Cook until tops look dried, about 30 minutes.