To Make The Tomato Sauce
Heat a little of the olive oil in a frying pan over medium heat, add the onion, garlic, oregano and red pepper. Cook for about 20 minutes until the onion and pepper are soft.
Add the tomatoes, tomato purée, Chipotle Paste, sugar, salt and pepper and stir. Leave to cook for 20 minutes.
Blitz in a food processor until smooth. Season to taste with salt and pepper.