Add 70 millilitres curry broth, 1 teaspoon garlic ginger paste, 1 fresh green finger chilli, finely sliced, 1 teaspoon tomato puree, 1/4 teaspoon mild red chilli powder, 1 teaspoon dried fenugreek leaves, pinch sea salt and 1 small handful fresh coriander leaves, finely chopped. Mix well and bring to the boil. Add another 70 millilitres curry broth. Mix well and simmer for 2 minutes.