Note
1: If using an Ooni, fire up your oven and preheat to 177°C.
Check the temperature of your baking stone quickly, accurately and from a safe distance with an infrared thermometer.
Note: If using a conventional oven, adjust the oven racks so one is in the middle position before preheating.
2: Place the capsicums on a baking sheet, rub them all over with olive oil, sprinkle with salt and spread them out in a single layer.
3: Roast the capsicums for about 30 minutes, turning them occasionally, until their skins are wrinkled and slightly charred in places.
4: Remove the capsicums from the oven and set aside to cool to room temperature.