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Line a baking sheet with aluminum foil. Place the bacon flat on the baking sheet. Place a sheet pan under the wire tray in your toaster oven.
To start, take out a baking sheet that will fit in your toaster oven. Line the baking sheet with aluminum foil. This will make clean up easier afterwards, as you can simply remove the foil and discard it. If you don't have aluminum foil, you can use parchment paper instead. Keep the bacon separated. It should not be touching or overlapping. Lie the bacon flat on the bacon sheet so it cooks completely. Make sure to wash your hands thoroughly after handling raw bacon. You should find a sheet pan that fits on the bottom of your toaster oven. If any bacon drips during the cooking process, a sheet pan will catch this. It is easier to remove the pan and clean it than clean the bottom of a toaster oven.