Preheat oven to 220°C grill

Brown onion in sauce pan with 25ml olive and seed oil blend

Add tomatoes and simmer for 20 minutes

Roast chillies, red bell peppers and garlic in oven for about 25 minutes or until lightly brown

Peel the peppers

Put everything in a food processor and liquidise until smooth

You can store the sauce in a glass container in the fridge for months