Heat the oil in a saucepan and add the garlic, cumin, all spice, ground ginger, cinnamon, turmeric and chilli; cook until the garlic becomes fragrant. Do not burn it, keep stirring as you cook.
Add the tomatoes, stock and salt, and simmer gently for 10 minutes. Taste and adjust the seasoning. Stir in the lemon zest and seafood mix, and heat through. Don’t overcook. Stir in the herbs and serve with couscous or rice.