Add garlic and cook a further minute. Add Gregg's Ground Coriander, Gregg's Ground Cumin, Gregg's Chilli Flakes and Gregg's Ground Smoked Paprika and stir until the spices smell fragrant. Pour over Wattie's Tomatoes Chopped in Juice and add Gregg's Rubbed Oregano, brown sugar and salt. Stir while bringing to the boil. Reduce heat to a low simmer. Cook for 30 minutes with the lid off, stirring occasionally making sure the sauce does not reduce too much. Remove from the heat.