Basic Napoletana sauce

Ingredients

• 2 400g cans of crushed tomatoes
• 1 medium brown onion, finely diced
• 1 long red chilli, finely diced
• 2 garlic cloves, crushed
• 2 tbsp. olive oil
• 1 tsp salt
• 1 tsp pepper
• 1 tbsp. dried oregano
• 6 basil leaves
• 1 cup water