About this recipe:This is a flavourful curry sauce from a recipe given to me by an Indian friend that's great with chickpeas or vegetables. I love to throw it in the slow cooker with frozen mixed veggies for a healthy Indian dinner. This sauce also freezes beautifully.
Place onions and garlic into a large saucepan and add water to cover. Bring to the boil and then reduce heat to medium-low. Cover and simmer for 45 minutes. Add the ginger and continue simmering for 5 minutes.
Puree the onion mixture in a food processor or blender, in batches, until smooth. Place a large saucepan over medium-high heat and pour in the diced tomatoes and spices. Bring to the boil, then pour in the onion puree. Reduce heat and simmer for 45 minutes.