Homemade Tomato Sauce (Ketchup)

Ingredients

• 1/2 small brown onion, finely chopped
• 400g tin no added salt diced tomato's
• 2 - 3 tbsp pure maple syrup
• 1/4 cup apple cider vinegar
• 1/2 tsp ground coriander seeds
• 1/2 tsp salt
• 1/2 tbsp paprika
• 1/2 tsp ground pepper or white pepper
• 1 tbsp no added salt tomato paste
• 1 tbsp yellow mild mustard (optional)
• 1 tbsp extra virgin olive oil