Preheat oven to its highest temperature.
Line a deep baking tray with baking paper.
Place all ingredients skin side up and sprinkle with salt.
Place tray on the highest rack in the oven and allow ingredients to blister and char. This should take 30minutes.
Take tray out and allow ingredients to cool.
Once cool enough to handle, remove the skin off all ingredients and place flesh into a food processor.
Process all ingredients until smooth and serve.