Add peppers and cook, tossing frequently with tongs, until soft and blistered in many spots, about 10 minutes.
Sprinkle with lots of flaky sea salt and serve (with spicy mayo if you like).
Video
Notes
After washing the peppers, dry them thoroughly before cooking to reduce any splatters and also prevent them from steaming in the pan.
These are best in the first hour or so after blistering, since their warmth offsets a nice cold drink. But I've never seen anyone turn them down at room temperature, either.
Store any leftovers tightly sealed in the fridge for up to a week. Eat them alone, or add to salads.