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Step 1
Preheat the Air Fryer to 350 degrees F / 180 degrees C.
Step 2
Remove the skins and slice onions into evenly thick slices.
Step 3
Place the sliced onions in an air fryer basket and brush with balsamic vinegar.
Step 4
Air fry for 10-12 minutes or until golden brown to your taste. Carefully flip the onions halfway through cooking.