In a large pot, combine the chopped tomatoes, onion, and garlic. Bring to a boil, then reduce the heat and simmer for about 45 minutes, or until the tomatoes break down and soften.
Blend the Mixture:
Once softened, use an immersion blender or regular blender to blend the mixture into a smooth sauce.
Strain the sauce through a fine sieve to remove skins and seeds.
Cook the Sauce:
Return the sauce to the pot and add the sugar, vinegar, lemon juice, and spices. Stir well and simmer on low heat for 1-2 hours, stirring occasionally until it thickens.
Season and Cool:
Taste and adjust the seasoning with salt and pepper. Allow the sauce to cool before bottling.
Store:
Pour the cooled sauce into sterilized bottles or jars. Keep it refrigerated for up to a few months.
Why It’s Popular in Australia:
Versatile: Australian tomato sauce is used with everything from sausage rolls and pies to fish and chips.