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1
Set a heavy frying pan or griddle over the highest available heat. Allow it to become thoroughly hot before adding anything — a drop of water placed in the pan should evaporate on contact.
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2
Film the pan with the smallest quantity of olive oil that will coat the surface. Add the peppers immediately in a single layer without crowding; work in batches if necessary. A pan that is too full causes the peppers to steam rather than char, and the dish is lost here: this is where it lives or dies.
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3
Toss or shake the pan continuously for 3 to 4 minutes. The peppers are ready when the skin is blistered and charred in spots across the surface while the flesh beneath remains slightly firm to a light press.
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4
Remove the peppers immediately to paper. Season at once with very coarse flaky sea salt. Serve within 5 minutes — the texture deflates on standing.