Preheat the oven to 300°F. Line a large rimmed baking sheet with aluminum foil or parchment paper.
Rinse the kale leaves and dry well with a salad spinner or blot with paper towels. Tear the leaves from ribs in 2-3 inch pieces.
Toss dry kale leaves with the olive oil in a large mixing bowl. Try to evenly cover all leaves and then spread out kale leaves in a single layer.
Bake in the oven for 10 minutes. Remove, turn and return for an additional 10 minutes. Turn oven off completely, but allow kale to remain in the oven until it has fully cooled and fully crisped.
Remove and sprinkle with salt.
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