This one is super simple.
Just wash the octopus (it’s best to let your fishmonger prepare it) then season with sea salt and ground chilli flakes.
Place it in a hot griddle pan with a little olive oil. You can tell when it’s done because the tentacle ends will go pink and you’ll get the grid marks from the pan.
I like to eat it as a snack so don’t really bother with much dressing etc. but it is nice with some garlic mayo as a dipping.